diff --git a/docs/changes.txt b/docs/changes.txt
index 9e8bb68ffb..ab858209f9 100644
--- a/docs/changes.txt
+++ b/docs/changes.txt
@@ -258,6 +258,7 @@ wxGTK:
 - implemented alpha channel support in wxBitmap
 - added native GTK+2 wxArtProvider implementation with ability to load
   icons from icon theme in addition to recognized stock art
+- fixed crash on 64 bit platforms (Paul Cornett)
 
 wxMotif:
 
diff --git a/include/wx/gtk/win_gtk.h b/include/wx/gtk/win_gtk.h
index 6440d8490a..2afb5ddfb5 100644
--- a/include/wx/gtk/win_gtk.h
+++ b/include/wx/gtk/win_gtk.h
@@ -82,7 +82,7 @@ struct _GtkPizzaClass
 				     GtkAdjustment  *vadjustment);
 };
 
-guint      gtk_pizza_get_type        (void);
+GtkType    gtk_pizza_get_type        (void);
 GtkWidget* gtk_pizza_new             (void);
 
 void       gtk_pizza_set_shadow_type (GtkPizza          *pizza,
diff --git a/include/wx/gtk1/win_gtk.h b/include/wx/gtk1/win_gtk.h
index 6440d8490a..2afb5ddfb5 100644
--- a/include/wx/gtk1/win_gtk.h
+++ b/include/wx/gtk1/win_gtk.h
@@ -82,7 +82,7 @@ struct _GtkPizzaClass
 				     GtkAdjustment  *vadjustment);
 };
 
-guint      gtk_pizza_get_type        (void);
+GtkType    gtk_pizza_get_type        (void);
 GtkWidget* gtk_pizza_new             (void);
 
 void       gtk_pizza_set_shadow_type (GtkPizza          *pizza,
diff --git a/src/gtk/win_gtk.c b/src/gtk/win_gtk.c
index 97eec73b97..633571107e 100644
--- a/src/gtk/win_gtk.c
+++ b/src/gtk/win_gtk.c
@@ -104,10 +104,10 @@ static GtkContainerClass *pizza_parent_class = NULL;
 
 static gboolean gravity_works;
 
-guint
+GtkType
 gtk_pizza_get_type ()
 {
-    static guint pizza_type = 0;
+    static GtkType pizza_type = 0;
 
     if (!pizza_type)
     {
diff --git a/src/gtk1/win_gtk.c b/src/gtk1/win_gtk.c
index 97eec73b97..633571107e 100644
--- a/src/gtk1/win_gtk.c
+++ b/src/gtk1/win_gtk.c
@@ -104,10 +104,10 @@ static GtkContainerClass *pizza_parent_class = NULL;
 
 static gboolean gravity_works;
 
-guint
+GtkType
 gtk_pizza_get_type ()
 {
-    static guint pizza_type = 0;
+    static GtkType pizza_type = 0;
 
     if (!pizza_type)
     {