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 305e6d09a5ed9a7ddc3adb8d936410816500179a..a8496278456d1932ac1924861a57a642d3e23c5b 100644
--- a/Trigger/TrigValidation/TriggerTest/share/ref_data_v1Dev_build.ref
+++ b/Trigger/TrigValidation/TriggerTest/share/ref_data_v1Dev_build.ref
@@ -115,8 +115,8 @@ TrigSignatureMoniMT INFO HLT_e5_etcut_L1EM3 #324
TrigSignatureMoniMT INFO -- #324908483 Events 20 20 13 13 13 - - - 13
TrigSignatureMoniMT INFO -- #324908483 Features 41 141 47 - - -
TrigSignatureMoniMT INFO HLT_e5_lhloose_noringer_L1EM3 #1053337356
-TrigSignatureMoniMT INFO -- #1053337356 Events 20 20 10 10 10 1 - - 1
-TrigSignatureMoniMT INFO -- #1053337356 Features 15 48 29 1 - -
+TrigSignatureMoniMT INFO -- #1053337356 Events 20 20 10 10 10 1 - - 1
+TrigSignatureMoniMT INFO -- #1053337356 Features 15 48 29 1 - -
TrigSignatureMoniMT INFO HLT_e5_lhmedium_noringer_L1EM3 #176627878
TrigSignatureMoniMT INFO -- #176627878 Events 20 20 9 9 9 0 - - 0
TrigSignatureMoniMT INFO -- #176627878 Features 13 49 28 0 - -
@@ -343,8 +343,8 @@ 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 - - - - -