--- a/src/image/tim_png.cpp	2011-12-29 22:13:37.000000000 +0100
+++ b/src/image/tim_png.cpp	2012-07-21 21:36:34.000000000 +0200
@@ -24,6 +24,7 @@
  */
 #include <stdio.h>
 #include <string.h>
+#include <zlib.h>
 #include "tim.h"
 #include <png.h>
 #include <zlib.h>