diff -up kdirstat-2.5.3/kdirstat/kdirtreecache.cpp.gcc43 kdirstat-2.5.3/kdirstat/kdirtreecache.cpp
--- kdirstat-2.5.3/kdirstat/kdirtreecache.cpp.gcc43	2006-02-05 12:31:45.000000000 -0600
+++ kdirstat-2.5.3/kdirstat/kdirtreecache.cpp	2008-03-31 12:20:08.000000000 -0500
@@ -10,6 +10,7 @@
 
 #include <ctype.h>
 #include <errno.h>
+#include <stdlib.h>
 #include <kdebug.h>
 #include "kdirtreecache.h"
 #include "kdirtree.h"