diff --git a/src/types.h b/src/types.h
index 372e170766fe3bc44a8e35479c972d38415a3d9e..5bed9f81313e1bebc3441adf933327714c32539f 100644
--- a/src/types.h
+++ b/src/types.h
@@ -1,5 +1,6 @@
 #ifndef TYPES_H
 #define TYPES_H
+#include "sys/types.h"
 
 /* we here define a few types with more defined values */