diff --git a/src/window.h b/src/window.h
index d6351d47d..5292ef66e 100644
--- a/src/window.h
+++ b/src/window.h
@@ -110,6 +110,9 @@ struct _MetaWindow
   guint has_minimize_func : 1;
   guint has_maximize_func : 1;
 
+  /* similar hints */
+  guint has_shade_func : 1;
+  
   /* Weird "_NET_WM_STATE_MODAL" flag */
   guint wm_state_modal : 1;
   /* If these are TRUE, it just means a client explicitly