diff --git a/include/wx/caret.h b/include/wx/caret.h
index 178a3b2fc7..af74625e80 100644
--- a/include/wx/caret.h
+++ b/include/wx/caret.h
@@ -57,6 +57,9 @@ public:
         (void)Create(window, size);
     }
 
+    // virtual dtor for pure virtual base.
+    virtual ~wxCaretBase() {}
+
     // Create() functions - same as ctor but returns the success code
     // --------------------------------------------------------------
 
diff --git a/include/wx/datetime.h b/include/wx/datetime.h
index 0b0c0fd3e2..305346dbf0 100644
--- a/include/wx/datetime.h
+++ b/include/wx/datetime.h
@@ -1296,6 +1296,9 @@ class WXDLLEXPORT wxDateTimeHolidayAuthority
 {
 friend class wxDateTimeHolidaysModule;
 public:
+    // virtual dtor for pure virtual base.
+    virtual ~wxDateTimeHolidayAuthority() {}
+
     // returns TRUE if the given date is a holiday
     static bool IsHoliday(const wxDateTime& dt);
 
diff --git a/include/wx/dir.h b/include/wx/dir.h
index c21dcdfda6..c9b5f7b7ee 100644
--- a/include/wx/dir.h
+++ b/include/wx/dir.h
@@ -48,6 +48,9 @@ enum wxDirTraverseResult
 class WXDLLEXPORT wxDirTraverser
 {
 public:
+    // virtual dtor for pure virtual base.
+    virtual ~wxDirTraverser() {}
+
     // called for each file found by wxDir::Traverse()
     //
     // return wxDIR_STOP or wxDIR_CONTINUE from here
diff --git a/include/wx/geometry.h b/include/wx/geometry.h
index 3ba0b8600f..9758e71eb0 100644
--- a/include/wx/geometry.h
+++ b/include/wx/geometry.h
@@ -781,15 +781,18 @@ inline bool wxRect2DInt::operator != (const wxRect2DInt& rect) const
 class wxTransform2D
 {
 public :
-    virtual void                    Transform( wxPoint2DInt* pt )const  = 0;
-    virtual void                    Transform( wxRect2DInt* r ) const;
-    virtual wxPoint2DInt    Transform( const wxPoint2DInt &pt ) const;
-    virtual wxRect2DInt        Transform( const wxRect2DInt &r ) const ;
+    // virtual dtor for pure virtual base.
+    virtual ~wxTransform2D() {}
 
-    virtual void                    InverseTransform( wxPoint2DInt* pt ) const  = 0;
-    virtual void                    InverseTransform( wxRect2DInt* r ) const ;
-    virtual wxPoint2DInt    InverseTransform( const wxPoint2DInt &pt ) const ;
-    virtual wxRect2DInt        InverseTransform( const wxRect2DInt &r ) const ;
+    virtual void Transform( wxPoint2DInt* pt ) const = 0;
+    virtual void Transform( wxRect2DInt* r ) const;
+    virtual wxPoint2DInt Transform( const wxPoint2DInt &pt ) const;
+    virtual wxRect2DInt Transform( const wxRect2DInt &r ) const;
+
+    virtual void InverseTransform( wxPoint2DInt* pt ) const = 0;
+    virtual void InverseTransform( wxRect2DInt* r ) const;
+    virtual wxPoint2DInt InverseTransform( const wxPoint2DInt &pt ) const;
+    virtual wxRect2DInt InverseTransform( const wxRect2DInt &r ) const;
 };
 
 inline void    wxTransform2D::Transform( wxRect2DInt* r ) const
diff --git a/include/wx/radiobox.h b/include/wx/radiobox.h
index 1ca6741786..6abad6c3eb 100644
--- a/include/wx/radiobox.h
+++ b/include/wx/radiobox.h
@@ -31,6 +31,9 @@ WXDLLEXPORT_DATA(extern const wxChar*) wxRadioBoxNameStr;
 class WXDLLEXPORT wxRadioBoxBase
 {
 public:
+    // virtual dtor for pure virtual base.
+    virtual ~wxRadioBoxBase() {}
+
     // selection
     virtual void SetSelection(int n) = 0;
     virtual int GetSelection() const = 0;