diff --git a/src/backends/x11/meta-clutter-backend-x11.h b/src/backends/x11/meta-clutter-backend-x11.h
index 91ce47f77..7a77d3885 100644
--- a/src/backends/x11/meta-clutter-backend-x11.h
+++ b/src/backends/x11/meta-clutter-backend-x11.h
@@ -63,7 +63,5 @@ MetaClutterBackendX11 * meta_clutter_backend_x11_new (MetaBackend *backend);
 void meta_clutter_x11_trap_x_errors (void);
 gint meta_clutter_x11_untrap_x_errors (void);
 
-Window meta_clutter_x11_get_root_window (void);
-
 void meta_clutter_x11_set_use_stereo_stage (gboolean use_stereo);
 gboolean meta_clutter_x11_get_use_stereo_stage (void);