diff --git a/net/openvswitch/conntrack.c b/net/openvswitch/conntrack.c
index 5ea74270da46e..58c9f0edc3c42 100644
--- a/net/openvswitch/conntrack.c
+++ b/net/openvswitch/conntrack.c
@@ -821,7 +821,7 @@ static int ovs_ct_nat(struct net *net, struct sw_flow_key *key,
 
 	/* Add NAT extension if not confirmed yet. */
 	if (!nf_ct_is_confirmed(ct) && !nf_ct_nat_ext_add(ct))
-		return NF_ACCEPT;   /* Can't NAT. */
+		return NF_DROP;   /* Can't NAT. */
 
 	/* Determine NAT type.
 	 * Check if the NAT type can be deduced from the tracked connection.