diff --git a/net/openvswitch/flow_netlink.c b/net/openvswitch/flow_netlink.c
index bb4dae198c788a4b195a1082054d10c552373b4b..dc424798ba6f3afcb3095e710ffaf5dfb42b85fe 100644
--- a/net/openvswitch/flow_netlink.c
+++ b/net/openvswitch/flow_netlink.c
@@ -338,7 +338,7 @@ size_t ovs_tun_key_attr_size(void)
 		+ nla_total_size(4);   /* OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS */
 }
 
-size_t ovs_nsh_key_attr_size(void)
+static size_t ovs_nsh_key_attr_size(void)
 {
 	/* Whenever adding new OVS_NSH_KEY_ FIELDS, we should consider
 	 * updating this function.