diff --git a/include/uapi/linux/xfrm.h b/include/uapi/linux/xfrm.h
index c5a4d7a7b8df..5f19800b41c5 100644
--- a/include/uapi/linux/xfrm.h
+++ b/include/uapi/linux/xfrm.h
@@ -520,7 +520,6 @@ struct xfrm_user_offload {
 #define XFRM_OFFLOAD_INBOUND	2
 
 struct xfrm_userpolicy_default {
-#define XFRM_USERPOLICY_DIRMASK_MAX	(sizeof(__u8) * 8)
 	__u8				dirmask;
 	__u8				action;
 };
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index efbc48c85a8b..344d7d34491b 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -1906,14 +1906,9 @@ static int xfrm_set_default(struct sk_buff *skb, struct nlmsghdr *nlh,
 {
 	struct net *net = sock_net(skb->sk);
 	struct xfrm_userpolicy_default *up = nlmsg_data(nlh);
-	u8 dirmask;
+	u8 dirmask = (1 << up->dirmask) & XFRM_POL_DEFAULT_MASK;
 	u8 old_default = net->xfrm.policy_default;
 
-	if (up->dirmask >= XFRM_USERPOLICY_DIRMASK_MAX)
-		return -EINVAL;
-
-	dirmask = (1 << up->dirmask) & XFRM_POL_DEFAULT_MASK;
-
 	net->xfrm.policy_default = (old_default & (0xff ^ dirmask))
 				    | (up->action << up->dirmask);