diff --git a/gtk/gtkimcontextsimple.c b/gtk/gtkimcontextsimple.c
index 0338b3f187..b695d96a0d 100644
--- a/gtk/gtkimcontextsimple.c
+++ b/gtk/gtkimcontextsimple.c
@@ -90,6 +90,7 @@ G_LOCK_DEFINE_STATIC (global_tables);
 static GSList *global_tables;
 
 static const guint16 gtk_compose_ignore[] = {
+  0, /* Yes, XKB will send us key press events with NoSymbol :( */
   GDK_KEY_Shift_L,
   GDK_KEY_Shift_R,
   GDK_KEY_Control_L,