diff --git a/src/vnet/gre/interface.c b/src/vnet/gre/interface.c
index 30dfa30..f2c679c 100644
--- a/src/vnet/gre/interface.c
+++ b/src/vnet/gre/interface.c
@@ -225,9 +225,11 @@
     switch (gt->mode)
       {
       case TUNNEL_MODE_P2P:
-	return (adj_nbr_walk (gt->sw_if_index, proto, gre_adj_walk_cb, NULL));
+	adj_nbr_walk (gt->sw_if_index, proto, gre_adj_walk_cb, NULL);
+	break;
       case TUNNEL_MODE_MP:
-	return (adj_nbr_walk (gt->sw_if_index, proto, mgre_adj_walk_cb, NULL));
+	adj_nbr_walk (gt->sw_if_index, proto, mgre_adj_walk_cb, NULL);
+	break;
       }
   }
 }