--- synfig-0.64.0/src/modules/mod_png/trgt_png.cpp.orig	2013-09-19 13:34:46.160236846 +0200
+++ synfig-0.64.0/src/modules/mod_png/trgt_png.cpp	2013-09-19 13:34:53.248166505 +0200
@@ -36,6 +36,7 @@
 #include <png.h>
 #include <ETL/stringf>
 #include <cstdio>
+#include <cstring>
 #include <algorithm>
 #include <functional>
 #include <ETL/misc>