diff --git a/include/linux/netfilter/nfnetlink_conntrack.h b/include/linux/netfilter/nfnetlink_conntrack.h
index c19595c8930491d8e0f64a2795d36cb127ee3b60..29fe9ea1d3463a5964ee158eeb1a39211b1c756f 100644
--- a/include/linux/netfilter/nfnetlink_conntrack.h
+++ b/include/linux/netfilter/nfnetlink_conntrack.h
@@ -141,6 +141,7 @@ enum ctattr_protonat {
 #define CTA_PROTONAT_MAX (__CTA_PROTONAT_MAX - 1)
 
 enum ctattr_natseq {
+	CTA_NAT_SEQ_UNSPEC,
 	CTA_NAT_SEQ_CORRECTION_POS,
 	CTA_NAT_SEQ_OFFSET_BEFORE,
 	CTA_NAT_SEQ_OFFSET_AFTER,