diff --git a/src/compositor.h b/src/compositor.h
index 7a8058e0..b8e767db 100644
--- a/src/compositor.h
+++ b/src/compositor.h
@@ -351,10 +351,6 @@ struct weston_compositor {
 	struct weston_xkb_info xkb_info;
 };
 
-enum weston_output_flags {
-	WL_OUTPUT_FLIPPED = 0x01
-};
-
 struct weston_region {
 	struct wl_resource resource;
 	pixman_region32_t region;