diff --git a/src/compat.h b/src/compat.h
index 68b108c..f5b7059 100644
--- a/src/compat.h
+++ b/src/compat.h
@@ -68,16 +68,6 @@ static inline void taskqgroup_drain_all(struct taskqgroup *tqg)
 #undef atomic_load_ptr
 #define atomic_load_ptr(p) (*(volatile __typeof(*p) *)(p))
 
-static inline void m_snd_tag_rele(struct m_snd_tag *mst)
-{
-	struct ifnet *ifp;
-	if (!mst)
-		return;
-	ifp = mst->ifp;
-	ifp->if_snd_tag_free(mst);
-	if_rele(ifp);
-}
-
 #endif
 
 #if __FreeBSD_version < 1202000
diff --git a/src/if_wg.c b/src/if_wg.c
index ab0b464..8910a0b 100644
--- a/src/if_wg.c
+++ b/src/if_wg.c
@@ -1478,10 +1478,8 @@ wg_mbuf_reset(struct mbuf *m)
 			m_tag_delete(m, t);
 	}
 
-	if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) {
-		m_snd_tag_rele(m->m_pkthdr.snd_tag);
-		m->m_pkthdr.snd_tag = NULL;
-	}
+	KASSERT((m->m_pkthdr.csum_flags & CSUM_SND_TAG) == 0,
+	    ("%s: mbuf %p has a send tag", __func__, m));
 
 	m->m_pkthdr.csum_flags = 0;
 	m->m_pkthdr.PH_per.sixtyfour[0] = 0;