diff --git a/gdk/x11/gdkwindow-x11.h b/gdk/x11/gdkwindow-x11.h
index bda2a58015..740fb08b76 100644
--- a/gdk/x11/gdkwindow-x11.h
+++ b/gdk/x11/gdkwindow-x11.h
@@ -158,10 +158,6 @@ GType gdk_window_impl_x11_get_type (void);
 void            gdk_x11_window_set_user_time        (GdkWindow *window,
 						     guint32    timestamp);
 
-void            gdk_x11_window_set_utf8_property    (GdkWindow *window,
-						     const gchar *name,
-						     const gchar *value);
-
 GdkToplevelX11 *_gdk_x11_window_get_toplevel        (GdkWindow *window);
 void            _gdk_x11_window_tmp_unset_bg        (GdkWindow *window,
 						     gboolean   recurse);
diff --git a/gdk/x11/gdkx11window.h b/gdk/x11/gdkx11window.h
index f648d965ac..68784ed6d5 100644
--- a/gdk/x11/gdkx11window.h
+++ b/gdk/x11/gdkx11window.h
@@ -57,6 +57,9 @@ GType    gdk_x11_window_get_type          (void);
 Window   gdk_x11_window_get_xid           (GdkWindow   *window);
 void     gdk_x11_window_set_user_time     (GdkWindow   *window,
                                            guint32      timestamp);
+void     gdk_x11_window_set_utf8_property    (GdkWindow *window,
+					      const gchar *name,
+					      const gchar *value);
 void     gdk_x11_window_set_theme_variant (GdkWindow   *window,
                                            char        *variant);
 void     gdk_x11_window_set_hide_titlebar_when_maximized (GdkWindow *window,