diff --git a/ripd/rip_interface.c b/ripd/rip_interface.c
index 0a01d8b..f58fb33 100644
--- a/ripd/rip_interface.c
+++ b/ripd/rip_interface.c
@@ -598,6 +598,7 @@
   
   /* To support pseudo interface do not free interface structure.  */
   /* if_delete(ifp); */
+  ifp->ifindex = IFINDEX_INTERNAL;
 
   return 0;
 }