diff -urNp klibc-1.4.13.org/usr/include/sys/types.h klibc-1.4.13/usr/include/sys/types.h
--- klibc-1.4.13.org/usr/include/sys/types.h	2006-07-25 23:55:23.000000000 +0300
+++ klibc-1.4.13/usr/include/sys/types.h	2007-02-07 15:24:03.000000000 +0200
@@ -96,6 +96,8 @@ typedef uint32_t __bitwise __be32;
 typedef uint64_t __bitwise __le64;
 typedef uint64_t __bitwise __be64;
 
+typedef __u16 __bitwise __sum16;
+
 /*
  * Some headers seem to require this...
  */