diff --git a/pimd/pim_igmp.h b/pimd/pim_igmp.h
index d45f223..f8a31cd 100644
--- a/pimd/pim_igmp.h
+++ b/pimd/pim_igmp.h
@@ -173,4 +173,7 @@
 void igmp_group_timer_on(struct igmp_group *group,
 			 long interval_msec, const char *ifname);
 
+struct igmp_source *
+source_new (struct igmp_group *group,
+	    struct in_addr src_addr);
 #endif /* PIM_IGMP_H */