diff --git a/gdk/gdkevents.h b/gdk/gdkevents.h
index 5aa74b94ee..f904d8b2de 100644
--- a/gdk/gdkevents.h
+++ b/gdk/gdkevents.h
@@ -484,10 +484,6 @@ int            gdk_event_get_scancode    (GdkEvent *event);
 GDK_AVAILABLE_IN_ALL
 gboolean       gdk_event_get_pointer_emulated (GdkEvent *event);
 
-GDK_AVAILABLE_IN_ALL
-void           gdk_event_set_user_data (GdkEvent *event,
-                                        GObject  *user_data);
-
 GDK_AVAILABLE_IN_ALL
 gboolean       gdk_event_is_sent       (const GdkEvent *event);
 
diff --git a/gdk/gdkeventsprivate.h b/gdk/gdkeventsprivate.h
index 91632604b1..b81faba589 100644
--- a/gdk/gdkeventsprivate.h
+++ b/gdk/gdkeventsprivate.h
@@ -632,4 +632,8 @@ union _GdkEvent
   GdkEventPadGroupMode      pad_group_mode;
 };
 
+void           gdk_event_set_user_data              (GdkEvent *event,
+                                                     GObject  *user_data);
+
+
 #endif /* __GDK_EVENTS_PRIVATE_H__ */