diff --git a/sys/kern/subr_witness.c b/sys/kern/subr_witness.c
--- a/sys/kern/subr_witness.c
+++ b/sys/kern/subr_witness.c
@@ -566,6 +566,12 @@
 	{ "tcp", &lock_class_mtx_sleep },
 	{ "so_snd", &lock_class_mtx_sleep },
 	{ NULL, NULL },
+	/*
+	 * IPv6 Addr
+	 */
+	{ "tcphash", &lock_class_mtx_sleep },
+	{ "in6_ifaddr_lock", &lock_class_rm },
+	{ NULL, NULL },
 	/*
 	 * BPF
 	 */