Fix typo in comment.
diff --git a/ripd/ripd.c b/ripd/ripd.c
index 4b5a19a..92eb9af 100644
--- a/ripd/ripd.c
+++ b/ripd/ripd.c
@@ -1470,7 +1470,7 @@
   if (if_is_loopback (ifp))
     return;
 
-  /* Check RIPng process is enabled on this interface. */
+  /* Check RIP process is enabled on this interface. */
   ri = ifp->info;
   if (! ri->running)
     return;