diff --git a/src/devices/wimax/bs-service-flow-manager.cc b/src/devices/wimax/bs-service-flow-manager.cc
index 09cf53124..313a788c4 100644
--- a/src/devices/wimax/bs-service-flow-manager.cc
+++ b/src/devices/wimax/bs-service-flow-manager.cc
@@ -226,7 +226,11 @@ void
 BsServiceFlowManager::AllocateServiceFlows (const DsaReq &dsaReq, Cid cid)
 {
   ServiceFlow *serviceFlow = ProcessDsaReq (dsaReq, cid);
+  if (serviceFlow) {
   ScheduleDsaRsp (serviceFlow, cid);
+  } else {
+	  NS_LOG_INFO ("No service Flow. Could not connect.");
+  }
 }
 
 void