diff --git a/pimd/pim_rpf.c b/pimd/pim_rpf.c
index 1724185e97..b71024711a 100644
--- a/pimd/pim_rpf.c
+++ b/pimd/pim_rpf.c
@@ -347,3 +347,12 @@ pim_rpf_addr_is_inaddr_any (struct pim_rpf *rpf)
 
   return 0;
 }
+
+int
+pim_rpf_is_same (struct pim_rpf *rpf1, struct pim_rpf *rpf2)
+{
+  if (rpf1->source_nexthop.interface == rpf2->source_nexthop.interface)
+    return 1;
+
+  return 0;
+}
diff --git a/pimd/pim_rpf.h b/pimd/pim_rpf.h
index b267a9b6fa..e54aa51256 100644
--- a/pimd/pim_rpf.h
+++ b/pimd/pim_rpf.h
@@ -69,5 +69,6 @@ enum pim_rpf_result pim_rpf_update(struct pim_upstream *up, struct in_addr *old_
 int pim_rpf_addr_is_inaddr_none (struct pim_rpf *rpf);
 int pim_rpf_addr_is_inaddr_any (struct pim_rpf *rpf);
 
+int pim_rpf_is_same (struct pim_rpf *rpf1, struct pim_rpf *rpf2);
 void pim_rpf_set_refresh_time (void);
 #endif /* PIM_RPF_H */