$OpenBSD: patch-configure_in,v 1.1.1.1 2006/06/12 11:14:08 espie Exp $
--- configure.in.orig	Thu Jul 28 23:26:00 2005
+++ configure.in	Mon Jun 12 13:04:54 2006
@@ -307,7 +307,8 @@ AC_MSG_RESULT("yes")
 # -------------------------------------------------------------------------
 
 AC_MSG_CHECKING("whether system V style IPC services are supported")
-AC_TRY_LINK([#include <sys/ipc.h>
+AC_TRY_LINK([#include <sys/types.h>
+#include <sys/ipc.h>
 #include <sys/shm.h>
 #include <sys/sem.h>
 ], [
@@ -354,7 +355,8 @@ fi
 
 AC_MSG_CHECKING("do we have union semun defined")
 AC_TRY_COMPILE(
-[#include <sys/ipc.h>
+[#include <sys/types.h>
+#include <sys/ipc.h>
 #include <sys/shm.h>
 #include <sys/sem.h>
 ], [