diff --git a/gdk/x11/gdkclipboard-x11.c b/gdk/x11/gdkclipboard-x11.c
index 80d060c9d3..80fea88d06 100644
--- a/gdk/x11/gdkclipboard-x11.c
+++ b/gdk/x11/gdkclipboard-x11.c
@@ -20,6 +20,7 @@
  * - implement MULTIPLE
  * - implement INCR
  * - cache remote data and shortcut
+ * - what about clipboard managers / store ?
  */
 
 #include "config.h"