diff --git a/gtk/gtk-autocleanups.h b/gtk/gtk-autocleanups.h
index 8eae230f44..f0328ab4a4 100644
--- a/gtk/gtk-autocleanups.h
+++ b/gtk/gtk-autocleanups.h
@@ -21,7 +21,6 @@
 
 #ifndef __GI_SCANNER__
 
-G_DEFINE_AUTOPTR_CLEANUP_FUNC(GtkAboutDialog, g_object_unref)
 G_DEFINE_AUTOPTR_CLEANUP_FUNC(GtkAccelLabel, g_object_unref)
 G_DEFINE_AUTOPTR_CLEANUP_FUNC(GtkAccelMap, g_object_unref)
 G_DEFINE_AUTOPTR_CLEANUP_FUNC(GtkAccessible, g_object_unref)
diff --git a/gtk/gtkaboutdialog.h b/gtk/gtkaboutdialog.h
index 341f75f325..fd7081c1aa 100644
--- a/gtk/gtkaboutdialog.h
+++ b/gtk/gtkaboutdialog.h
@@ -204,6 +204,10 @@ void                  gtk_about_dialog_add_credit_section      (GtkAboutDialog
                                                                 const gchar     *section_name,
                                                                 const gchar    **people);
 
+#ifndef __GI_SCANNER__
+G_DEFINE_AUTOPTR_CLEANUP_FUNC(GtkAboutDialog, g_object_unref)
+#endif
+
 G_END_DECLS
 
 #endif /* __GTK_ABOUT_DIALOG_H__ */