diff --git a/sys/netinet/in_mcast.c b/sys/netinet/in_mcast.c
index 9c049160ac92..f076f148e63e 100644
--- a/sys/netinet/in_mcast.c
+++ b/sys/netinet/in_mcast.c
@@ -399,9 +399,6 @@ in_getmulti(struct ifnet *ifp, const struct in_addr *group,
 	struct in_multi		*inm;
 	int error;
 
-#if defined(INVARIANTS) && defined(IFF_ASSERTGIANT)
-	IFF_ASSERTGIANT(ifp);
-#endif
 	IN_MULTI_LOCK_ASSERT();
 
 	ii = (struct in_ifinfo *)ifp->if_afdata[AF_INET];
@@ -511,11 +508,6 @@ inm_release_locked(struct in_multi *inm)
 {
 	struct ifmultiaddr *ifma;
 
-#if defined(INVARIANTS) && defined(IFF_ASSERTGIANT)
-	if (!inm_is_ifp_detached(inm))
-		IFF_ASSERTGIANT(ifp);
-#endif
-
 	IN_MULTI_LOCK_ASSERT();
 
 	CTR2(KTR_IGMPV3, "%s: refcount is %d", __func__, inm->inm_refcount);
@@ -1220,11 +1212,6 @@ in_leavegroup_locked(struct in_multi *inm, /*const*/ struct in_mfilter *imf)
 
 	error = 0;
 
-#if defined(INVARIANTS) && defined(IFF_ASSERTGIANT)
-	if (!inm_is_ifp_detached(inm))
-		IFF_ASSERTGIANT(inm->inm_ifp);
-#endif
-
 	IN_MULTI_LOCK_ASSERT();
 
 	CTR5(KTR_IGMPV3, "%s: leave inm %p, %s/%s, imf %p", __func__,