diff --git a/sys/kern/kern_mbuf.c b/sys/kern/kern_mbuf.c
index b47c96f4496a..128a1d32e8be 100644
--- a/sys/kern/kern_mbuf.c
+++ b/sys/kern/kern_mbuf.c
@@ -343,7 +343,6 @@ mb_dtor_pack(void *mem, int size, void *arg)
 	KASSERT(m->m_ext.ext_args == NULL, ("%s: ext_args != NULL", __func__));
 	KASSERT(m->m_ext.ext_size == MCLBYTES, ("%s: ext_size != MCLBYTES", __func__));
 	KASSERT(m->m_ext.ext_type == EXT_PACKET, ("%s: ext_type != EXT_PACKET", __func__));
-	KASSERT(m->m_ext.ref_cnt == NULL, ("%s: ref_cnt != NULL", __func__));
 #ifdef INVARIANTS
 	trash_dtor(m->m_ext.ext_buf, MCLBYTES, arg);
 #endif