diff -urN libclaw-1.7.0/claw/image.hpp libclaw-1.7.0-patched/claw/image.hpp
--- libclaw-1.7.0/claw/image.hpp	2011-06-12 21:01:53.000000000 +1100
+++ libclaw-1.7.0-patched/claw/image.hpp	2012-01-14 12:11:19.152564991 +1100
@@ -37,6 +37,7 @@
 #include <iterator>
 #include <iostream>
 #include <cstddef>
+#include <zlib.h>
 
 namespace claw
 {