diff --git a/ip/xfrm.h b/ip/xfrm.h
index 8566d639..71be574d 100644
--- a/ip/xfrm.h
+++ b/ip/xfrm.h
@@ -30,6 +30,10 @@
 #include <linux/xfrm.h>
 #include <linux/ipsec.h>
 
+#ifndef IPPROTO_MH
+#define IPPROTO_MH              135
+#endif
+
 #define XFRMS_RTA(x)  ((struct rtattr*)(((char*)(x)) + NLMSG_ALIGN(sizeof(struct xfrm_usersa_info))))
 #define XFRMS_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct xfrm_usersa_info))