diff --git a/MuonSpectrometer/MuonCnv/MuonRPC_CnvTools/src/RpcRdoToPrepDataTool.cxx b/MuonSpectrometer/MuonCnv/MuonRPC_CnvTools/src/RpcRdoToPrepDataTool.cxx
index 3748776cc11b3302486e6c8a620a4342f06ad0d4..d481fdac6d2e8d5a6a98d52aca6eafde26e65c5b 100755
--- a/MuonSpectrometer/MuonCnv/MuonRPC_CnvTools/src/RpcRdoToPrepDataTool.cxx
+++ b/MuonSpectrometer/MuonCnv/MuonRPC_CnvTools/src/RpcRdoToPrepDataTool.cxx
@@ -1,5 +1,5 @@
 /*
-  Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
+  Copyright (C) 2002-2018 CERN for the benefit of the ATLAS collaboration
 */
 
 
@@ -85,7 +85,8 @@ Muon::RpcRdoToPrepDataTool::RpcRdoToPrepDataTool( const std::string& type, const
   declareProperty("OutputCollection",          	m_rdoContainerKey = std::string("RPCPAD"),"RpcPadContainer to retrieve");
   declareProperty("TriggerOutputCollection", 	m_rpcPrepDataContainerKey = std::string("RPC_Measurements"),"Muon::RpcPrepDataContainer to record");
   declareProperty("InputCollection", 		m_rpcCoinDataContainerKey = std::string("RPC_triggerHits"),"Muon::RpcCoinDataContainer to record");
-  
+
+  m_rpcCoinDataContainer = nullptr;
 }
 
 //___________________________________________________________________________