diff --git a/contrib/check-config.sh b/contrib/check-config.sh
index 6a87e103c8..d32ffb9ebe 100755
--- a/contrib/check-config.sh
+++ b/contrib/check-config.sh
@@ -186,7 +186,7 @@ flags=(
 	VETH BRIDGE BRIDGE_NETFILTER
 	NF_NAT_IPV4 IP_NF_FILTER IP_NF_TARGET_MASQUERADE
 	NETFILTER_XT_MATCH_{ADDRTYPE,CONNTRACK,IPVS}
-	NF_NAT NF_NAT_NEEDED
+	IP_NF_NAT NF_NAT NF_NAT_NEEDED
 
 	# required for bind-mounting /dev/mqueue into containers
 	POSIX_MQUEUE