diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c
index a57f0d69eadb..85107bf812f2 100644
--- a/net/ipv4/igmp.c
+++ b/net/ipv4/igmp.c
@@ -1228,12 +1228,8 @@ static void igmpv3_del_delrec(struct in_device *in_dev, struct ip_mc_list *im)
 	if (pmc) {
 		im->interface = pmc->interface;
 		if (im->sfmode == MCAST_INCLUDE) {
-			im->tomb = pmc->tomb;
-			pmc->tomb = NULL;
-
-			im->sources = pmc->sources;
-			pmc->sources = NULL;
-
+			swap(im->tomb, pmc->tomb);
+			swap(im->sources, pmc->sources);
 			for (psf = im->sources; psf; psf = psf->sf_next)
 				psf->sf_crcount = in_dev->mr_qrv ?: net->ipv4.sysctl_igmp_qrv;
 		} else {