zebra link state detection support
diff --git a/ripd/ripd.c b/ripd/ripd.c
index 3c55479..c63bf10 100644
--- a/ripd/ripd.c
+++ b/ripd/ripd.c
@@ -2231,7 +2231,7 @@
       if (if_is_loopback (ifp))
 	continue;
 
-      if (! if_is_up (ifp))
+      if (! if_is_operative (ifp))
 	continue;
 
       /* Fetch RIP interface information. */