--- src/Window.cc.orig	2002-09-17 11:23:35.000000000 -0400
+++ src/Window.cc	    2004-02-10 20:44:23.000000000 -0500
@@ -44,6 +44,7 @@
 #endif // HAVE_STDLIB_H
 }
 
+#include <cassert>
 #include "i18n.hh"
 #include "blackbox.hh"
 #include "GCCache.hh"
