--- mp4_helper.hpp-dist	2014-03-02 13:07:13.000000000 +0000
+++ mp4_helper.hpp	2014-03-02 15:59:21.000000000 +0000
@@ -25,7 +25,7 @@
 
 #ifndef MP4_HELPER_HPP_
 #define MP4_HELPER_HPP_
-
+#include <sys/types.h>
 #include <mp4v2/mp4v2.h>
 #include <string>
 #include <exception>