--- rxvt-unicode/src/rxvt.h	2012/04/11 10:20:00	1.471
+++ rxvt-unicode/src/rxvt.h	2012/05/13 15:28:44	1.472
@@ -1142,7 +1142,10 @@
   int         shade;
   int         h_blurRadius, v_blurRadius;
 
-  bool bg_set_transparent ();
+  void bg_set_transparent ()
+  {
+    bg_flags |= BG_IS_TRANSPARENT;
+  }
   void bg_set_root_pixmap ();
   void set_tint_shade_flags ();
   bool bg_set_tint (rxvt_color &new_tint);