diff --git a/src/dsdv/model/dsdv-routing-protocol.cc b/src/dsdv/model/dsdv-routing-protocol.cc
index 94e722e8f..06f1759c6 100644
--- a/src/dsdv/model/dsdv-routing-protocol.cc
+++ b/src/dsdv/model/dsdv-routing-protocol.cc
@@ -840,7 +840,7 @@ RoutingProtocol::SendPeriodicUpdate ()
   m_routingTable.Purge (removedAddresses);
   MergeTriggerPeriodicUpdates ();
   m_routingTable.GetListOfAllRoutes (allRoutes);
-  if (allRoutes.size () < 0)
+  if (allRoutes.empty ())
     {
       return;
     }