diff --git a/net/decnet/dn_route.c b/net/decnet/dn_route.c
index 5d742f1..73a1307 100644
--- a/net/decnet/dn_route.c
+++ b/net/decnet/dn_route.c
@@ -1196,7 +1196,8 @@
 
 	err = __dn_route_output_key(pprt, fl, flags & MSG_TRYHARD);
 	if (err == 0 && fl->proto) {
-		err = xfrm_lookup(pprt, fl, sk, !(flags & MSG_DONTWAIT));
+		err = xfrm_lookup(pprt, fl, sk, (flags & MSG_DONTWAIT) ?
+						XFRM_LOOKUP_WAIT : 0);
 	}
 	return err;
 }