diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index ed5bb34f817fac5eb80835dd65323b4bb2660232..9c5ee9f20b65b7ef336652fc640331c67bc22c8f 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -207,7 +207,7 @@ struct xfrm_type;
 struct xfrm_dst;
 struct xfrm_policy_afinfo {
 	unsigned short		family;
-	struct xfrm_type	*type_map[256];
+	struct xfrm_type	*type_map[IPPROTO_MAX];
 	struct xfrm_mode	*mode_map[XFRM_MODE_MAX];
 	struct dst_ops		*dst_ops;
 	void			(*garbage_collect)(void);