diff --git a/libweston/backend-drm/state-propose.c b/libweston/backend-drm/state-propose.c
index 1d4943b3..a6adfb35 100644
--- a/libweston/backend-drm/state-propose.c
+++ b/libweston/backend-drm/state-propose.c
@@ -981,10 +981,11 @@ drm_assign_planes(struct weston_output *output_base)
 		/* Test whether this buffer can ever go into a plane:
 		 * non-shm, or small enough to be a cursor.
 		 *
-		 * Also, keep a reference when using the pixman renderer.
-		 * That makes it possible to do a seamless switch to the GL
-		 * renderer and since the pixman renderer keeps a reference
-		 * to the buffer anyway, there is no side effects.
+		 * FIXME: Also, we should keep a reference when using the
+		 * pixman renderer.  That makes it possible to do a seamless
+		 * switch to the GL renderer and since the pixman renderer
+		 * keeps a reference to the buffer anyway, there is no side
+		 * effects.
 		 */
 		ev->surface->keep_buffer = false;
 		if (weston_view_has_valid_buffer(ev)) {