diff --git a/headers/posix/sys/types.h b/headers/posix/sys/types.h
index 9a1efbeff7..602ac6aace 100644
--- a/headers/posix/sys/types.h
+++ b/headers/posix/sys/types.h
@@ -1,3 +1,47 @@
-// ToDo: fix me!
-#include <ktypes.h>
+/*
+ * Distributed under the terms of the OpenBeOS license
+ */
+#ifndef _SYS_TYPES_H
+#define _SYS_TYPES_H
+
+/* BSD compatibility */
+typedef unsigned long 		u_long;
+typedef unsigned int 		u_int;
+typedef unsigned short 		u_short;
+typedef unsigned char 		u_char;
+
+
+/* sysV compatibility */
+#ifndef _SUPPORT_DEFS_H 
+  typedef unsigned long 	ulong;
+  typedef unsigned short 	ushort;
+  typedef unsigned int 		uint;
+#endif
+typedef unsigned char		unchar;
+
+
+typedef long long 			blkcnt_t;
+typedef int 				blksize_t;
+typedef long long 			fsblkcnt_t;
+typedef long long			fsfilcnt_t;
+typedef long long           off_t;
+typedef long long           ino_t;
+typedef int                 cnt_t;
+typedef long                dev_t;
+typedef long		        pid_t;
+
+typedef unsigned int 		uid_t;
+typedef unsigned int 		gid_t;
+typedef unsigned int        mode_t;
+typedef unsigned int 		umode_t;
+typedef int                 nlink_t;
+
+typedef int          		daddr_t;
+typedef char *				caddr_t;
+
+
+#include <null.h>
+#include <size_t.h>
 #include <time.h>
+
+#endif