diff --git a/src/vnet/session/session_lookup.c b/src/vnet/session/session_lookup.c
index 1e58e5e..3a461a5 100644
--- a/src/vnet/session/session_lookup.c
+++ b/src/vnet/session/session_lookup.c
@@ -595,7 +595,7 @@
 
   st = session_table_get (table_index);
   if (!st)
-    return SESSION_INVALID_INDEX;
+    return SESSION_INVALID_HANDLE;
   ASSERT (st->is_local);
 
   if (sep->is_ip4)