diff --git a/sys/netinet/in_mcast.c b/sys/netinet/in_mcast.c
index 0b22980f8838..b0d53b02ab54 100644
--- a/sys/netinet/in_mcast.c
+++ b/sys/netinet/in_mcast.c
@@ -1178,11 +1178,8 @@ in_joingroup_locked(struct ifnet *ifp, const struct in_addr *gina,
 int
 in_leavegroup(struct in_multi *inm, /*const*/ struct in_mfilter *imf)
 {
-	struct ifnet *ifp;
 	int error;
 
-	ifp = inm->inm_ifp;
-
 	IN_MULTI_LOCK();
 	error = in_leavegroup_locked(inm, imf);
 	IN_MULTI_UNLOCK();