diff --git a/headers/posix/sys/types.h b/headers/posix/sys/types.h
index 66e5692cd2..9306eedaad 100644
--- a/headers/posix/sys/types.h
+++ b/headers/posix/sys/types.h
@@ -4,6 +4,10 @@
 #ifndef _SYS_TYPES_H
 #define _SYS_TYPES_H
 
+
+#include <BeBuild.h>
+
+
 /* BSD compatibility */
 typedef unsigned long 		u_long;
 typedef unsigned int 		u_int;