--- rxvt-unicode/src/rxvt.h	2012/06/06 22:00:20	1.502
+++ rxvt-unicode/src/rxvt.h	2012/06/07 09:34:51	1.504
@@ -1195,6 +1195,7 @@
 
     BG_IS_TRANSPARENT    = 1 << 1,
     BG_NEEDS_REFRESH     = 1 << 2,
+    BG_INHIBIT_RENDER    = 1 << 3,
   };
 
   uint8_t bg_flags;
@@ -1232,7 +1233,7 @@
   bool bg_window_size_sensitive ();
   bool bg_window_position_sensitive ();
 
-  bool bg_render ();
+  void bg_render ();
   void bg_invalidate ()
   {
     bg_flags &= ~BG_IS_VALID;