diff --git a/net/ipv4/esp4.c b/net/ipv4/esp4.c
index 917d991bf..76a73d8ee 100755
--- a/net/ipv4/esp4.c
+++ b/net/ipv4/esp4.c
@@ -239,7 +239,8 @@ static int esp_output_tail_tcp(struct xfrm_state *x, struct sk_buff *skb)
 #else
 static int esp_output_tail_tcp(struct xfrm_state *x, struct sk_buff *skb)
 {
-	WARN_ON(1);
+	kfree_skb(skb);
+
 	return -EOPNOTSUPP;
 }
 #endif
diff --git a/net/ipv6/esp6.c b/net/ipv6/esp6.c
index a628c7561..140e6923c 100755
--- a/net/ipv6/esp6.c
+++ b/net/ipv6/esp6.c
@@ -255,7 +255,8 @@ static int esp_output_tail_tcp(struct xfrm_state *x, struct sk_buff *skb)
 #else
 static int esp_output_tail_tcp(struct xfrm_state *x, struct sk_buff *skb)
 {
-	WARN_ON(1);
+	kfree_skb(skb);
+
 	return -EOPNOTSUPP;
 }
 #endif