--- libretro-dinothawr-02821dd/utils.hpp	2017-06-02 15:32:28.527780477 +0200
+++ libretro-dinothawr-02821dd/utils.hpp	2017-06-02 15:24:23.781305524 +0200
@@ -15,6 +15,7 @@
 #include <limits>
 #include <memory>
 #include <errno.h>
+#include <functional>
 
 #include <pugixml/pugixml.hpp>
 
