diff --git a/Trigger/TrigSteer/L1Decoder/src/JRoIsUnpackingTool.cxx b/Trigger/TrigSteer/L1Decoder/src/JRoIsUnpackingTool.cxx
index 33a8107e5e7eb3756d88190aca77d558060f4ee3..b4ad8e77e3e801ee41b713dda2e812fd0cedb750 100644
--- a/Trigger/TrigSteer/L1Decoder/src/JRoIsUnpackingTool.cxx
+++ b/Trigger/TrigSteer/L1Decoder/src/JRoIsUnpackingTool.cxx
@@ -50,7 +50,7 @@ StatusCode JRoIsUnpackingTool::unpack( const EventContext& ctx,
 
   // Additional FS RoI tagged with the decisions of all chains
   auto trigFSRoIs = std::make_unique< TrigRoiDescriptorCollection >();
-  trigFSRoIs->push_back( new TrigRoiDescriptor() ); // the argument-less c'tor is crating the FS RoI
+  trigFSRoIs->push_back( new TrigRoiDescriptor( true ) ); // the c'tor for the FS RoI
   auto fsDecisionOutput = std::make_unique<DecisionContainer>();
   auto fsDecisionAux    = std::make_unique<DecisionAuxContainer>();
   fsDecisionOutput->setStore( fsDecisionAux.get() );