diff --git a/include/wx/calctrl.h b/include/wx/calctrl.h
index 494b0975a1..de8881187e 100644
--- a/include/wx/calctrl.h
+++ b/include/wx/calctrl.h
@@ -164,7 +164,7 @@ public:
     wxCalendarEvent(const wxCalendarEvent& event)
         : wxDateEvent(event), m_wday(event.m_wday) { }
 
-    void SetWeekDay(const wxDateTime::WeekDay wd) { m_wday = wd; }
+    void SetWeekDay(wxDateTime::WeekDay wd) { m_wday = wd; }
     wxDateTime::WeekDay GetWeekDay() const { return m_wday; }
 
     virtual wxEvent *Clone() const wxOVERRIDE { return new wxCalendarEvent(*this); }
diff --git a/include/wx/gdicmn.h b/include/wx/gdicmn.h
index bef06b11ff..35f680adea 100644
--- a/include/wx/gdicmn.h
+++ b/include/wx/gdicmn.h
@@ -925,7 +925,7 @@ class WXDLLIMPEXP_CORE wxResourceCache: public wxList
 public:
     wxResourceCache() { }
 #if !wxUSE_STD_CONTAINERS
-    wxResourceCache(const unsigned int keyType) : wxList(keyType) { }
+    wxResourceCache(unsigned int keyType) : wxList(keyType) { }
 #endif
     virtual ~wxResourceCache();
 };
diff --git a/include/wx/generic/dirctrlg.h b/include/wx/generic/dirctrlg.h
index 6c7b4f0b26..9eb1554035 100644
--- a/include/wx/generic/dirctrlg.h
+++ b/include/wx/generic/dirctrlg.h
@@ -80,7 +80,7 @@ class WXDLLIMPEXP_CORE wxGenericDirCtrl: public wxControl
 {
 public:
     wxGenericDirCtrl();
-    wxGenericDirCtrl(wxWindow *parent, const wxWindowID id = wxID_ANY,
+    wxGenericDirCtrl(wxWindow *parent, wxWindowID id = wxID_ANY,
               const wxString &dir = wxDirDialogDefaultFolderStr,
               const wxPoint& pos = wxDefaultPosition,
               const wxSize& size = wxDefaultSize,
@@ -93,7 +93,7 @@ public:
         Create(parent, id, dir, pos, size, style, filter, defaultFilter, name);
     }
 
-    bool Create(wxWindow *parent, const wxWindowID id = wxID_ANY,
+    bool Create(wxWindow *parent, wxWindowID id = wxID_ANY,
               const wxString &dir = wxDirDialogDefaultFolderStr,
               const wxPoint& pos = wxDefaultPosition,
               const wxSize& size = wxDefaultSize,
@@ -228,7 +228,7 @@ class WXDLLIMPEXP_CORE wxDirFilterListCtrl: public wxChoice
 {
 public:
     wxDirFilterListCtrl() { Init(); }
-    wxDirFilterListCtrl(wxGenericDirCtrl* parent, const wxWindowID id = wxID_ANY,
+    wxDirFilterListCtrl(wxGenericDirCtrl* parent, wxWindowID id = wxID_ANY,
               const wxPoint& pos = wxDefaultPosition,
               const wxSize& size = wxDefaultSize,
               long style = 0)
@@ -237,7 +237,7 @@ public:
         Create(parent, id, pos, size, style);
     }
 
-    bool Create(wxGenericDirCtrl* parent, const wxWindowID id = wxID_ANY,
+    bool Create(wxGenericDirCtrl* parent, wxWindowID id = wxID_ANY,
               const wxPoint& pos = wxDefaultPosition,
               const wxSize& size = wxDefaultSize,
               long style = 0);
diff --git a/include/wx/generic/grid.h b/include/wx/generic/grid.h
index e466aba0a4..32a634158a 100644
--- a/include/wx/generic/grid.h
+++ b/include/wx/generic/grid.h
@@ -2117,21 +2117,21 @@ protected:
 
     // generate the appropriate grid event and return -1 if it was vetoed, 1 if
     // it was processed (but not vetoed) and 0 if it wasn't processed
-    int SendEvent(const wxEventType evtType,
+    int SendEvent(wxEventType evtType,
                   int row, int col,
                   const wxMouseEvent& e);
-    int SendEvent(const wxEventType evtType,
+    int SendEvent(wxEventType evtType,
                   const wxGridCellCoords& coords,
                   const wxMouseEvent& e)
         { return SendEvent(evtType, coords.GetRow(), coords.GetCol(), e); }
-    int SendEvent(const wxEventType evtType,
+    int SendEvent(wxEventType evtType,
                   int row, int col,
                   const wxString& s = wxString());
-    int SendEvent(const wxEventType evtType,
+    int SendEvent(wxEventType evtType,
                   const wxGridCellCoords& coords,
                   const wxString& s = wxString())
         { return SendEvent(evtType, coords.GetRow(), coords.GetCol(), s); }
-    int SendEvent(const wxEventType evtType, const wxString& s = wxString())
+    int SendEvent(wxEventType evtType, const wxString& s = wxString())
         { return SendEvent(evtType, m_currentCellCoords, s); }
 
     // send wxEVT_GRID_{ROW,COL}_SIZE or wxEVT_GRID_COL_AUTO_SIZE, return true
diff --git a/include/wx/generic/srchctlg.h b/include/wx/generic/srchctlg.h
index f6d085a79d..3eb8d21c92 100644
--- a/include/wx/generic/srchctlg.h
+++ b/include/wx/generic/srchctlg.h
@@ -180,7 +180,7 @@ public:
     wxTextCtrl& operator<<(long i);
     wxTextCtrl& operator<<(float f);
     wxTextCtrl& operator<<(double d);
-    wxTextCtrl& operator<<(const wxChar c);
+    wxTextCtrl& operator<<(wxChar c);
 #endif
 
     // do the window-specific processing after processing the update event
diff --git a/include/wx/gtk/menu.h b/include/wx/gtk/menu.h
index baec0a0e7f..49126e5583 100644
--- a/include/wx/gtk/menu.h
+++ b/include/wx/gtk/menu.h
@@ -75,7 +75,7 @@ public:
 
     void Attach(wxMenuBarBase *menubar) wxOVERRIDE;
 
-    void SetLayoutDirection(const wxLayoutDirection dir);
+    void SetLayoutDirection(wxLayoutDirection dir);
     wxLayoutDirection GetLayoutDirection() const;
 
     // Returns the title, with mnemonics translated to wx format
diff --git a/include/wx/html/helpwnd.h b/include/wx/html/helpwnd.h
index 3626a9a3d8..54639ad877 100644
--- a/include/wx/html/helpwnd.h
+++ b/include/wx/html/helpwnd.h
@@ -108,7 +108,7 @@ public:
 
     // Alternative version that works with numeric ID.
     // (uses extension to MS format, <param name="ID" value=id>, see docs)
-    bool Display(const int id);
+    bool Display(int id);
 
     // Displays help window and focuses contents.
     bool DisplayContents();
diff --git a/include/wx/html/webkit.h b/include/wx/html/webkit.h
index cfc210470e..0898182601 100644
--- a/include/wx/html/webkit.h
+++ b/include/wx/html/webkit.h
@@ -165,7 +165,7 @@ class WXDLLIMPEXP_CORE wxWebKitStateChangedEvent : public wxCommandEvent
 
 public:
     int GetState() { return m_state; }
-    void SetState(const int state) { m_state = state; }
+    void SetState(int state) { m_state = state; }
     wxString GetURL() { return m_url; }
     void SetURL(const wxString& url) { m_url = url; }
 
diff --git a/include/wx/memory.h b/include/wx/memory.h
index 401835378c..d6cc18301e 100644
--- a/include/wx/memory.h
+++ b/include/wx/memory.h
@@ -215,7 +215,7 @@ protected:
     // Returns the amount of padding needed after something of the given
     // size. This is so that when we cast pointers backwards and forwards
     // the pointer value will be valid for a wxMarkerType.
-    static size_t GetPadding (const size_t size) ;
+    static size_t GetPadding (size_t size) ;
 
     // Traverse the list.
     static void TraverseList (PmSFV, wxMemStruct *from = NULL);
@@ -244,17 +244,17 @@ public:
 
     // Calculated from the request size and any padding needed
     // before the final marker.
-    static size_t PaddedSize (const size_t reqSize);
+    static size_t PaddedSize (size_t reqSize);
 
     // Calc the total amount of space we need from the system
     // to satisfy a caller request. This includes all padding.
-    static size_t TotSize (const size_t reqSize);
+    static size_t TotSize (size_t reqSize);
 
     // Return valid pointers to offsets within the allocated memory.
     static char * StructPos (const char * buf);
     static char * MidMarkerPos (const char * buf);
     static char * CallerMemPos (const char * buf);
-    static char * EndMarkerPos (const char * buf, const size_t size);
+    static char * EndMarkerPos (const char * buf, size_t size);
 
     // Given a pointer to the start of the caller requested area
     // return a pointer to the start of the entire alloc\'d buffer.
diff --git a/include/wx/osx/cocoa/private.h b/include/wx/osx/cocoa/private.h
index b952b40d58..8c6553e5ac 100644
--- a/include/wx/osx/cocoa/private.h
+++ b/include/wx/osx/cocoa/private.h
@@ -35,7 +35,7 @@ OSStatus WXDLLIMPEXP_CORE wxMacDrawCGImage(
 WX_NSImage WXDLLIMPEXP_CORE wxOSXGetNSImageFromCGImage( CGImageRef image, double scale = 1.0, bool isTemplate = false);
 WX_NSImage WXDLLIMPEXP_CORE wxOSXGetNSImageFromIconRef( WXHICON iconref );
 CGImageRef WXDLLIMPEXP_CORE wxOSXCreateCGImageFromNSImage( WX_NSImage nsimage, double *scale = NULL );
-CGImageRef WXDLLIMPEXP_CORE wxOSXGetCGImageFromNSImage( const WX_NSImage nsimage, CGRect* r, CGContextRef cg);
+CGImageRef WXDLLIMPEXP_CORE wxOSXGetCGImageFromNSImage( WX_NSImage nsimage, CGRect* r, CGContextRef cg);
 CGContextRef WXDLLIMPEXP_CORE wxOSXCreateBitmapContextFromNSImage( WX_NSImage nsimage, bool *isTemplate = NULL);
 
 wxBitmap WXDLLIMPEXP_CORE wxOSXCreateSystemBitmap(const wxString& id, const wxString &client, const wxSize& size);
diff --git a/include/wx/qt/private/converter.h b/include/wx/qt/private/converter.h
index 208ac86fce..f6406a8009 100644
--- a/include/wx/qt/private/converter.h
+++ b/include/wx/qt/private/converter.h
@@ -52,7 +52,7 @@ QSize  wxQtConvertSize( const wxSize &size );
 Qt::Orientation wxQtConvertOrientation( long style, wxOrientation defaultOrientation );
 wxOrientation wxQtConvertOrientation( Qt::Orientation );
 
-wxKeyCode wxQtConvertKeyCode( int key, const Qt::KeyboardModifiers modifiers );
+wxKeyCode wxQtConvertKeyCode( int key, Qt::KeyboardModifiers modifiers );
 void wxQtFillKeyboardModifiers( Qt::KeyboardModifiers modifiers, wxKeyboardState *state );
 int wxQtConvertKeyCode( int keyCode, int modifiers, Qt::KeyboardModifiers &qtmodifiers );
 
diff --git a/include/wx/ustring.h b/include/wx/ustring.h
index 1c533264e3..25934f6dc4 100644
--- a/include/wx/ustring.h
+++ b/include/wx/ustring.h
@@ -549,13 +549,13 @@ public:
         { return assign( s ); }
     wxUString& operator=(const wxScopedU32CharBuffer &s)
         { return assign( s ); }
-    wxUString& operator=(const char ch)
+    wxUString& operator=(char ch)
         { return assign( ch ); }
-    wxUString& operator=(const wxChar16 ch)
+    wxUString& operator=(wxChar16 ch)
         { return assign( ch ); }
-    wxUString& operator=(const wxChar32 ch)
+    wxUString& operator=(wxChar32 ch)
         { return assign( ch ); }
-    wxUString& operator=(const wxUniChar ch)
+    wxUString& operator=(wxUniChar ch)
         { return assign( ch ); }
     wxUString& operator=(const wxUniCharRef ch)
         { return assign( ch ); }
@@ -579,13 +579,13 @@ public:
         { return append( s ); }
     wxUString& operator+=(const wxScopedU32CharBuffer &s)
         { return append( s ); }
-    wxUString& operator+=(const char ch)
+    wxUString& operator+=(char ch)
         { return append( ch ); }
-    wxUString& operator+=(const wxChar16 ch)
+    wxUString& operator+=(wxChar16 ch)
         { return append( ch ); }
-    wxUString& operator+=(const wxChar32 ch)
+    wxUString& operator+=(wxChar32 ch)
         { return append( ch ); }
-    wxUString& operator+=(const wxUniChar ch)
+    wxUString& operator+=(wxUniChar ch)
         { return append( ch ); }
     wxUString& operator+=(const wxUniCharRef ch)
         { return append( ch ); }
diff --git a/include/wx/wxcrt.h b/include/wx/wxcrt.h
index d6826da025..dbf556310c 100644
--- a/include/wx/wxcrt.h
+++ b/include/wx/wxcrt.h
@@ -95,7 +95,7 @@ WXDLLIMPEXP_BASE size_t wxWC2MB(char *buf, const wchar_t *psz, size_t n);
         return (wxChar*) memmove(szOut, szIn, len * sizeof(wxChar));
     }
 
-    inline wxChar* wxTmemset(wxChar* szOut, const wxChar cIn, size_t len)
+    inline wxChar* wxTmemset(wxChar* szOut, wxChar cIn, size_t len)
     {
         wxChar* szRet = szOut;
 
@@ -117,7 +117,7 @@ inline char* wxTmemcpy(char* szOut, const char* szIn, size_t len)
     { return (char*)memcpy(szOut, szIn, len); }
 inline char* wxTmemmove(char* szOut, const char* szIn, size_t len)
     { return (char*)memmove(szOut, szIn, len); }
-inline char* wxTmemset(char* szOut, const char cIn, size_t len)
+inline char* wxTmemset(char* szOut, char cIn, size_t len)
     { return (char*)memset(szOut, cIn, len); }
 
 
diff --git a/include/wx/zstream.h b/include/wx/zstream.h
index ec07bcb8ac..d7391440a7 100644
--- a/include/wx/zstream.h
+++ b/include/wx/zstream.h
@@ -44,7 +44,7 @@ class WXDLLIMPEXP_BASE wxZlibInputStream: public wxFilterInputStream {
 
   static bool CanHandleGZip();
 
-  bool SetDictionary(const char *data, const size_t datalen);
+  bool SetDictionary(const char *data, size_t datalen);
   bool SetDictionary(const wxMemoryBuffer &buf);
 
  protected:
@@ -75,7 +75,7 @@ class WXDLLIMPEXP_BASE wxZlibOutputStream: public wxFilterOutputStream {
 
   static bool CanHandleGZip();
 
-  bool SetDictionary(const char *data, const size_t datalen);
+  bool SetDictionary(const char *data, size_t datalen);
   bool SetDictionary(const wxMemoryBuffer &buf);
 
  protected:
diff --git a/interface/wx/calctrl.h b/interface/wx/calctrl.h
index a59e64f5e0..688c7fdf91 100644
--- a/interface/wx/calctrl.h
+++ b/interface/wx/calctrl.h
@@ -62,7 +62,7 @@ public:
         Sets the week day carried by the event, normally only used by the
         library internally.
     */
-    void SetWeekDay(const wxDateTime::WeekDay day);
+    void SetWeekDay(wxDateTime::WeekDay day);
 };
 
 wxEventType wxEVT_CALENDAR_SEL_CHANGED;
diff --git a/interface/wx/dirctrl.h b/interface/wx/dirctrl.h
index 71ca5bb183..dc43e1d6d1 100644
--- a/interface/wx/dirctrl.h
+++ b/interface/wx/dirctrl.h
@@ -98,7 +98,7 @@ public:
         @param name
             The window name.
     */
-    wxGenericDirCtrl(wxWindow* parent, const wxWindowID id = wxID_ANY,
+    wxGenericDirCtrl(wxWindow* parent, wxWindowID id = wxID_ANY,
                      const wxString& dir = wxDirDialogDefaultFolderStr,
                      const wxPoint& pos = wxDefaultPosition,
                      const wxSize& size = wxDefaultSize,
@@ -126,7 +126,7 @@ public:
         Create function for two-step construction. See wxGenericDirCtrl() for
         details.
     */
-    bool Create(wxWindow* parent, const wxWindowID id = wxID_ANY,
+    bool Create(wxWindow* parent, wxWindowID id = wxID_ANY,
                 const wxString& dir = wxDirDialogDefaultFolderStr,
                 const wxPoint& pos = wxDefaultPosition,
                 const wxSize& size = wxDefaultSize,
@@ -268,11 +268,11 @@ class wxDirFilterListCtrl: public wxChoice
 {
 public:
     wxDirFilterListCtrl();
-    wxDirFilterListCtrl(wxGenericDirCtrl* parent, const wxWindowID id = wxID_ANY,
+    wxDirFilterListCtrl(wxGenericDirCtrl* parent, wxWindowID id = wxID_ANY,
                         const wxPoint& pos = wxDefaultPosition,
                         const wxSize& size = wxDefaultSize,
                         long style = 0);
-    bool Create(wxGenericDirCtrl* parent, const wxWindowID id = wxID_ANY,
+    bool Create(wxGenericDirCtrl* parent, wxWindowID id = wxID_ANY,
                 const wxPoint& pos = wxDefaultPosition,
                 const wxSize& size = wxDefaultSize,
                 long style = 0);
diff --git a/interface/wx/html/helpwnd.h b/interface/wx/html/helpwnd.h
index 870f8ad313..e2b17d7fbe 100644
--- a/interface/wx/html/helpwnd.h
+++ b/interface/wx/html/helpwnd.h
@@ -110,7 +110,7 @@ public:
         This form takes numeric ID as the parameter (uses an extension to MS format,
         param name="ID" value=id).
     */
-    bool Display(const int id);
+    bool Display(int id);
 
     /**
         Displays contents panel.
diff --git a/interface/wx/html/webkit.h b/interface/wx/html/webkit.h
index 2caa7f4a80..dce5f0e5f5 100644
--- a/interface/wx/html/webkit.h
+++ b/interface/wx/html/webkit.h
@@ -124,7 +124,7 @@ class wxWebKitStateChangedEvent : public wxCommandEvent
 {
 public:
     int GetState();
-    void SetState(const int state);
+    void SetState(int state);
     wxString GetURL();
     void SetURL(const wxString& url);
 
diff --git a/interface/wx/zstream.h b/interface/wx/zstream.h
index 8319f3ae7d..47cfe02c1b 100644
--- a/interface/wx/zstream.h
+++ b/interface/wx/zstream.h
@@ -85,7 +85,7 @@ public:
 
         Returns @true if the dictionary was successfully set.
     */
-    bool SetDictionary(const char *data, const size_t datalen);
+    bool SetDictionary(const char *data, size_t datalen);
     bool SetDictionary(const wxMemoryBuffer &buf);
     //@}
 };
@@ -144,7 +144,7 @@ public:
 
         Returns @true if the dictionary was successfully set.
     */
-    bool SetDictionary(const char *data, const size_t datalen);
+    bool SetDictionary(const char *data, size_t datalen);
     bool SetDictionary(const wxMemoryBuffer &buf);
     //@}
 };
diff --git a/src/common/memory.cpp b/src/common/memory.cpp
index eb8155c36e..f31d76136f 100644
--- a/src/common/memory.cpp
+++ b/src/common/memory.cpp
@@ -490,7 +490,7 @@ char * wxDebugContext::CallerMemPos (const char * buf)
 }
 
 
-char * wxDebugContext::EndMarkerPos (const char * buf, const size_t size)
+char * wxDebugContext::EndMarkerPos (const char * buf, size_t size)
 {
     return CallerMemPos (buf) + PaddedSize (size);
 }
@@ -517,13 +517,13 @@ char * wxDebugContext::StartPos (const char * caller)
   // Note: this function is now obsolete (along with CalcAlignment)
   // because the calculations are done statically, for greater speed.
 */
-size_t wxDebugContext::GetPadding (const size_t size)
+size_t wxDebugContext::GetPadding (size_t size)
 {
     size_t pad = size % CalcAlignment ();
     return (pad) ? sizeof(wxMarkerType) - pad : 0;
 }
 
-size_t wxDebugContext::PaddedSize (const size_t size)
+size_t wxDebugContext::PaddedSize (size_t size)
 {
     // Added by Terry Farnham <TJRT@pacbell.net> to replace
     // slow GetPadding call.
@@ -541,7 +541,7 @@ size_t wxDebugContext::PaddedSize (const size_t size)
   in order to satisfy a caller request. This includes space for the struct
   plus markers and the caller's memory as well.
 */
-size_t wxDebugContext::TotSize (const size_t reqSize)
+size_t wxDebugContext::TotSize (size_t reqSize)
 {
     return (PaddedSize (sizeof (wxMemStruct)) + PaddedSize (reqSize) +
             2 * sizeof(wxMarkerType));
diff --git a/src/common/zstream.cpp b/src/common/zstream.cpp
index bf4c53cf3d..8ae6c1c466 100644
--- a/src/common/zstream.cpp
+++ b/src/common/zstream.cpp
@@ -266,7 +266,7 @@ size_t wxZlibInputStream::OnSysRead(void *buffer, size_t size)
   return major > 1 || (major == 1 && minor >= 2);
 }
 
-bool wxZlibInputStream::SetDictionary(const char *data, const size_t datalen)
+bool wxZlibInputStream::SetDictionary(const char *data, size_t datalen)
 {
     return (inflateSetDictionary(m_inflate, (Bytef*)data, datalen) == Z_OK);
 }
@@ -437,7 +437,7 @@ size_t wxZlibOutputStream::OnSysWrite(const void *buffer, size_t size)
   return wxZlibInputStream::CanHandleGZip();
 }
 
-bool wxZlibOutputStream::SetDictionary(const char *data, const size_t datalen)
+bool wxZlibOutputStream::SetDictionary(const char *data, size_t datalen)
 {
     return (deflateSetDictionary(m_deflate, (Bytef*)data, datalen) == Z_OK);
 }
diff --git a/src/generic/dirctrlg.cpp b/src/generic/dirctrlg.cpp
index 1b0d774b11..93a92facc2 100644
--- a/src/generic/dirctrlg.cpp
+++ b/src/generic/dirctrlg.cpp
@@ -371,7 +371,7 @@ void wxGenericDirCtrl::ExpandRoot()
 }
 
 bool wxGenericDirCtrl::Create(wxWindow *parent,
-                              const wxWindowID treeid,
+                              wxWindowID treeid,
                               const wxString& dir,
                               const wxPoint& pos,
                               const wxSize& size,
@@ -1272,7 +1272,7 @@ wxBEGIN_EVENT_TABLE(wxDirFilterListCtrl, wxChoice)
 wxEND_EVENT_TABLE()
 
 bool wxDirFilterListCtrl::Create(wxGenericDirCtrl* parent,
-                                 const wxWindowID treeid,
+                                 wxWindowID treeid,
                                  const wxPoint& pos,
                                  const wxSize& size,
                                  long style)
diff --git a/src/generic/grid.cpp b/src/generic/grid.cpp
index c7c26a9bfb..ac80d27ff3 100644
--- a/src/generic/grid.cpp
+++ b/src/generic/grid.cpp
@@ -4630,7 +4630,7 @@ wxGrid::SendGridSizeEvent(wxEventType type,
 //  +1 if the event was processed (but not vetoed)
 //   0 if the event wasn't handled
 int
-wxGrid::SendEvent(const wxEventType type,
+wxGrid::SendEvent(wxEventType type,
                   int row, int col,
                   const wxMouseEvent& mouseEv)
 {
@@ -4705,7 +4705,7 @@ wxGrid::SendEvent(const wxEventType type,
 // Generate a grid event of specified type, return value same as above
 //
 int
-wxGrid::SendEvent(const wxEventType type, int row, int col, const wxString& s)
+wxGrid::SendEvent(wxEventType type, int row, int col, const wxString& s)
 {
     wxGridEvent gridEvt( GetId(), type, this, row, col );
     gridEvt.SetString(s);
diff --git a/src/html/helpwnd.cpp b/src/html/helpwnd.cpp
index 2a593b0801..b7340cccf4 100644
--- a/src/html/helpwnd.cpp
+++ b/src/html/helpwnd.cpp
@@ -701,7 +701,7 @@ bool wxHtmlHelpWindow::Display(const wxString& x)
     return false;
 }
 
-bool wxHtmlHelpWindow::Display(const int id)
+bool wxHtmlHelpWindow::Display(int id)
 {
     wxString url = m_Data->FindPageById(id);
     if (!url.empty())
diff --git a/src/qt/converter.cpp b/src/qt/converter.cpp
index 334c41d131..fbc14a34c3 100644
--- a/src/qt/converter.cpp
+++ b/src/qt/converter.cpp
@@ -142,7 +142,7 @@ wxOrientation wxQtConvertOrientation( Qt::Orientation qtOrientation )
 
 /* Auxiliar function for key events. Returns the wx keycode for a qt one.
  * The event is needed to check it flags (numpad key or not) */
-wxKeyCode wxQtConvertKeyCode( int key, const Qt::KeyboardModifiers modifiers )
+wxKeyCode wxQtConvertKeyCode( int key, Qt::KeyboardModifiers modifiers )
 {
     /* First treat common ranges and then handle specific values
      * The macro takes Qt first and last codes and the first wx code