diff --git a/src/gtk/button.cpp b/src/gtk/button.cpp
index 88e29ac4f3..19c8d2521b 100644
--- a/src/gtk/button.cpp
+++ b/src/gtk/button.cpp
@@ -105,8 +105,6 @@ wxgtk_button_style_set_callback(GtkWidget* widget, GtkStyle*, wxButton* win)
 // wxButton
 //-----------------------------------------------------------------------------
 
-IMPLEMENT_DYNAMIC_CLASS(wxButton,wxControl)
-
 bool wxButton::Create(wxWindow *parent,
                       wxWindowID id,
                       const wxString &label,
diff --git a/src/gtk/dialog.cpp b/src/gtk/dialog.cpp
index 0d05469ff8..7fcfd47c56 100644
--- a/src/gtk/dialog.cpp
+++ b/src/gtk/dialog.cpp
@@ -32,8 +32,6 @@ wxDEFINE_TIED_SCOPED_PTR_TYPE(wxGUIEventLoop)
 // wxDialog
 //-----------------------------------------------------------------------------
 
-IMPLEMENT_DYNAMIC_CLASS(wxDialog,wxTopLevelWindow)
-
 void wxDialog::Init()
 {
     m_modalLoop = NULL;