diff --git a/samples/minimal/minimal.cpp b/samples/minimal/minimal.cpp
index 5ba383e3c3..29c30397a5 100644
--- a/samples/minimal/minimal.cpp
+++ b/samples/minimal/minimal.cpp
@@ -61,7 +61,8 @@ class MyFrame : public wxFrame
 {
 public:
     // ctor(s)
-    MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
+    MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size,
+            long style = wxDEFAULT_FRAME_STYLE);
 
     // event handlers (these functions should _not_ be virtual)
     void OnQuit(wxCommandEvent& event);
@@ -137,8 +138,8 @@ bool MyApp::OnInit()
 // ----------------------------------------------------------------------------
 
 // frame constructor
-MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
-       : wxFrame(NULL, -1, title, pos, size)
+MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size, long style)
+       : wxFrame(NULL, -1, title, pos, size, style)
 {
     // set the frame icon
     SetIcon(wxICON(mondrian));
diff --git a/src/motif/frame.cpp b/src/motif/frame.cpp
index 14b660afe3..cd5b22c681 100644
--- a/src/motif/frame.cpp
+++ b/src/motif/frame.cpp
@@ -304,8 +304,6 @@ bool wxFrame::Create(wxWindow *parent,
             decor |= MWM_DECOR_TITLE;
         if (style & wxTHICK_FRAME)
             decor |= MWM_DECOR_BORDER;
-        if (style & wxTHICK_FRAME)
-            decor |= MWM_DECOR_BORDER;
         if (style & wxMINIMIZE_BOX)
             decor |= MWM_DECOR_MINIMIZE;
         if (style & wxMAXIMIZE_BOX)
diff --git a/src/x11/toplevel.cpp b/src/x11/toplevel.cpp
index 1f683ae6cd..68f9b1b4c7 100644
--- a/src/x11/toplevel.cpp
+++ b/src/x11/toplevel.cpp
@@ -511,7 +511,7 @@ bool wxSetWMDecorations(Window w, long style)
         hints.decorations |= MWM_DECOR_TITLE;
     }
 
-    if ((style & wxTHICK_FRAME) || (style & wxSIMPLE_BORDER) || (style & wxCAPTION))
+    if ((style & wxTHICK_FRAME) || (style & wxCAPTION))
     {
         // wxLogDebug("MWM_DECOR_BORDER");
         hints.flags |= MWM_HINTS_DECORATIONS;