--- zzzz-none-000/linux-4.9.218/include/net/netfilter/nf_conntrack_extend.h	2020-04-02 15:20:41.000000000 +0000
+++ seale-7590ax-750/linux-4.9.218/include/net/netfilter/nf_conntrack_extend.h	2023-03-29 10:59:08.000000000 +0000
@@ -27,6 +27,9 @@
 #if IS_ENABLED(CONFIG_NETFILTER_SYNPROXY)
 	NF_CT_EXT_SYNPROXY,
 #endif
+#if IS_ENABLED(CONFIG_NF_CONNTRACK_RTCACHE)
+	NF_CT_EXT_RTCACHE,
+#endif
 	NF_CT_EXT_NUM,
 };
 
@@ -39,6 +42,7 @@
 #define NF_CT_EXT_TIMEOUT_TYPE struct nf_conn_timeout
 #define NF_CT_EXT_LABELS_TYPE struct nf_conn_labels
 #define NF_CT_EXT_SYNPROXY_TYPE struct nf_conn_synproxy
+#define NF_CT_EXT_RTCACHE_TYPE struct nf_conn_rtcache
 
 /* Extensions: optional stuff which isn't permanently in struct. */
 struct nf_ct_ext {