diff --git a/net/ipv4/gre_demux.c b/net/ipv4/gre_demux.c
index 66fdbfe5447c..e81539285bba 100644
--- a/net/ipv4/gre_demux.c
+++ b/net/ipv4/gre_demux.c
@@ -63,6 +63,7 @@ int gre_parse_header(struct sk_buff *skb, struct tnl_ptk_info *tpi,
 		     bool *csum_err, __be16 proto, int nhs)
 {
 	const struct gre_base_hdr *greh;
+	bool has_seq = false;
 	__be32 *options;
 	int hdr_len;
 
@@ -104,6 +105,7 @@ int gre_parse_header(struct sk_buff *skb, struct tnl_ptk_info *tpi,
 	if (unlikely(greh->flags & GRE_SEQ)) {
 		tpi->seq = *options;
 		options++;
+		has_seq = true;
 	} else {
 		tpi->seq = 0;
 	}
@@ -128,7 +130,7 @@ int gre_parse_header(struct sk_buff *skb, struct tnl_ptk_info *tpi,
 	 * to 0 and sets the configured key in the
 	 * inner erspan header field
 	 */
-	if (greh->protocol == htons(ETH_P_ERSPAN) ||
+	if ((greh->protocol == htons(ETH_P_ERSPAN) && has_seq) ||
 	    greh->protocol == htons(ETH_P_ERSPAN2)) {
 		struct erspan_base_hdr *ershdr;