diff --git a/pimd/pim_igmp.c b/pimd/pim_igmp.c
index 063ba6edd275..c70c7e73afd3 100644
--- a/pimd/pim_igmp.c
+++ b/pimd/pim_igmp.c
@@ -224,6 +224,7 @@ void igmp_source_forward_stop(struct gm_source *source)
 
 	tib_sg_gm_prune(pim_oif->pim, sg, group->interface,
 			&source->source_channel_oil);
+	source->source_channel_oil = NULL;
 	IGMP_SOURCE_DONT_FORWARDING(source->source_flags);
 }