--- src/graph/image/Header.cc.orig	Mon Dec  1 10:55:09 2003
+++ src/graph/image/Header.cc	Mon Dec  1 10:55:17 2003
@@ -23,6 +23,7 @@
 	\author	Nestal Wan
 */
 
+#include <cassert>
 #include "Header.hh"
 
 namespace image {