diff -urpN a/source/paint/detail/image_png.hpp b/source/paint/detail/image_png.hpp
--- a/source/paint/detail/image_png.hpp	2016-02-08 12:57:42.000000000 +0100
+++ b/source/paint/detail/image_png.hpp	2016-07-10 12:20:27.927506748 +0200
@@ -10,7 +10,7 @@
 	#include <png.h>
 #endif
 
-#include <stdio.h>
+#include <cstring>
 
 namespace nana
 {