--- a/src/image/tim_png.cpp	2011-10-11 22:18:11.000000000 +0200
+++ b/src/image/tim_png.cpp	2012-01-19 19:58:24.000000000 +0100
@@ -24,6 +24,7 @@
  */
 #include <stdio.h>
 #include <string.h>
+#include <zlib.h>
 #include "tim.h"
 #include "png.h"