$OpenBSD: patch-Network_Socket_ByteString_IOVec_hsc,v 1.2 2013/07/18 21:48:49 kili Exp $
--- Network/Socket/ByteString/IOVec.hsc.orig	Fri Feb 22 01:03:06 2013
+++ Network/Socket/ByteString/IOVec.hsc	Mon Jul  8 15:27:10 2013
@@ -9,6 +9,7 @@ import Foreign.C.Types (CChar, CInt, CSize)
 import Foreign.Ptr (Ptr)
 import Foreign.Storable (Storable(..))
 
+#include <sys/types.h>
 #include <sys/uio.h>
 
 data IOVec = IOVec
