diff --git a/Trigger/TrigSteer/L1Decoder/src/FSRoIsUnpackingTool.cxx b/Trigger/TrigSteer/L1Decoder/src/FSRoIsUnpackingTool.cxx
index 8a9e2b574d4129664aa3e93d3b6b9bc2281d1465..27c8cca0de2ac339c6bdb85095f86ef802164d61 100644
--- a/Trigger/TrigSteer/L1Decoder/src/FSRoIsUnpackingTool.cxx
+++ b/Trigger/TrigSteer/L1Decoder/src/FSRoIsUnpackingTool.cxx
@@ -67,7 +67,7 @@ StatusCode FSRoIsUnpackingTool::unpack( const EventContext& ctx,
std::inserter(activeFSchains, activeFSchains.end() ) );
auto decision = TrigCompositeUtils::newDecisionIn( decisionOutput, "L1" ); // This "L1" denotes an initial node with no parents
- for ( auto c: activeFSchains ) addDecisionID( c, decision );
+ addChainsToDecision( HLT::Identifier( "FSNOSEED" ), decision, activeChains );
ATH_MSG_DEBUG("Unpacking FS RoI for " << activeFSchains.size() << " chains: " << [&](){
TrigCompositeUtils::DecisionIDContainer ids;
diff --git a/Trigger/TrigValidation/TrigAnalysisTest/share/ref_RDOtoRDOTrig_mt1_build.ref b/Trigger/TrigValidation/TrigAnalysisTest/share/ref_RDOtoRDOTrig_mt1_build.ref
index 2f155d0dd2efb76aa42963912b6a48c37eb102c3..bbd57d2282fac1a72679fdef0ff4a7df9114e975 100644
--- a/Trigger/TrigValidation/TrigAnalysisTest/share/ref_RDOtoRDOTrig_mt1_build.ref
+++ b/Trigger/TrigValidation/TrigAnalysisTest/share/ref_RDOtoRDOTrig_mt1_build.ref
@@ -332,8 +332,8 @@ TrigSignatureMoniMT INFO HLT_mu6_mu4_L12MU4 #1713
TrigSignatureMoniMT INFO -- #1713982776 Events 4 4 4 4 4 4 - - 4
TrigSignatureMoniMT INFO -- #1713982776 Features 8 8 12 10 - -
TrigSignatureMoniMT INFO HLT_mu6_mu6noL1_L1MU6 #451489897
-TrigSignatureMoniMT INFO -- #451489897 Events 10 10 0 0 0 0 0 0 0
-TrigSignatureMoniMT INFO -- #451489897 Features 0 0 0 0 0 0
+TrigSignatureMoniMT INFO -- #451489897 Events 10 10 10 10 10 10 6 4 4
+TrigSignatureMoniMT INFO -- #451489897 Features 14 13 16 15 9 7
TrigSignatureMoniMT INFO HLT_mu6fast_L1MU6 #3518031697
TrigSignatureMoniMT INFO -- #3518031697 Events 10 10 10 - - - - - 10
TrigSignatureMoniMT INFO -- #3518031697 Features 14 - - - - -
diff --git a/Trigger/TrigValidation/TriggerTest/share/ref_data_v1Dev_build.ref b/Trigger/TrigValidation/TriggerTest/share/ref_data_v1Dev_build.ref
index 9f751c83ffcce0a3ccd5ddce7dac1bf2f1e0a9c8..c6a29a8963312cca013f3bb65a669cf7f398c411 100644
--- a/Trigger/TrigValidation/TriggerTest/share/ref_data_v1Dev_build.ref
+++ b/Trigger/TrigValidation/TriggerTest/share/ref_data_v1Dev_build.ref
@@ -341,8 +341,8 @@ TrigSignatureMoniMT INFO HLT_mu6_mu4_L12MU4 #171
TrigSignatureMoniMT INFO -- #1713982776 Events 20 20 1 0 0 0 - - 0
TrigSignatureMoniMT INFO -- #1713982776 Features 2 0 0 0 - -
TrigSignatureMoniMT INFO HLT_mu6_mu6noL1_L1MU6 #451489897
-TrigSignatureMoniMT INFO -- #451489897 Events 20 20 0 0 0 0 0 0 0
-TrigSignatureMoniMT INFO -- #451489897 Features 0 0 0 0 0 0
+TrigSignatureMoniMT INFO -- #451489897 Events 20 20 1 1 0 0 0 0 0
+TrigSignatureMoniMT INFO -- #451489897 Features 1 1 0 0 0 0
TrigSignatureMoniMT INFO HLT_mu6fast_L1MU6 #3518031697
TrigSignatureMoniMT INFO -- #3518031697 Events 20 20 1 - - - - - 1
TrigSignatureMoniMT INFO -- #3518031697 Features 1 - - - - -