--- ./y4mdenoise/Region2D.hh.orig	2007-12-23 15:44:07.000000000 +0000
+++ ./y4mdenoise/Region2D.hh	2007-12-23 15:44:16.000000000 +0000
@@ -17,6 +17,7 @@
 #include "Status_t.h"
 #include <iostream>
 
+#include <assert.h>
 
 
 // The 2-dimensional region class.  Parameterized by the numeric type