diff --git a/Trigger/TrigValidation/TrigAnalysisTest/share/ref_RDOtoRDOTrig_mt1_build.ref b/Trigger/TrigValidation/TrigAnalysisTest/share/ref_RDOtoRDOTrig_mt1_build.ref
index 1bd0aee89433c2822eee7e5a750886b63d197fdd..4f4df949aa4c50b03deddeb321d388e3d60e5a7f 100644
--- a/Trigger/TrigValidation/TrigAnalysisTest/share/ref_RDOtoRDOTrig_mt1_build.ref
+++ b/Trigger/TrigValidation/TrigAnalysisTest/share/ref_RDOtoRDOTrig_mt1_build.ref
@@ -136,6 +136,9 @@ TrigSignatureMoniMT INFO -- #385248610 Features
TrigSignatureMoniMT INFO HLT_g5_tight_L1EM3 #3280865118
TrigSignatureMoniMT INFO -- #3280865118 Events 20 20 16 16 16 9 - 9
TrigSignatureMoniMT INFO -- #3280865118 Features 45 45 84 9 -
+TrigSignatureMoniMT INFO HLT_j0_perf_L1J12_EMPTY #1341875780
+TrigSignatureMoniMT INFO -- #1341875780 Events 0 0 0 - - - - 0
+TrigSignatureMoniMT INFO -- #1341875780 Features 0 - - - -
TrigSignatureMoniMT INFO HLT_j0_vbenfSEP30etSEP34mass35SEP50fbet_L1J20 #4034799151
TrigSignatureMoniMT INFO -- #4034799151 Events 19 19 15 - - - - 15
TrigSignatureMoniMT INFO -- #4034799151 Features 425 - - - -
diff --git a/Trigger/TrigValidation/TriggerTest/share/ref_data_v1Dev_build.ref b/Trigger/TrigValidation/TriggerTest/share/ref_data_v1Dev_build.ref
index 0907a8ecac46f782f51b9b278a93eddb7665346c..151dc5131d3807449e5df240e4b8739bb392a844 100644
--- a/Trigger/TrigValidation/TriggerTest/share/ref_data_v1Dev_build.ref
+++ b/Trigger/TrigValidation/TriggerTest/share/ref_data_v1Dev_build.ref
@@ -142,6 +142,9 @@ TrigSignatureMoniMT INFO -- #385248610 Features
TrigSignatureMoniMT INFO HLT_g5_tight_L1EM3 #3280865118
TrigSignatureMoniMT INFO -- #3280865118 Events 20 20 9 9 9 1 - 1
TrigSignatureMoniMT INFO -- #3280865118 Features 13 13 30 1 -
+TrigSignatureMoniMT INFO HLT_j0_perf_L1J12_EMPTY #1341875780
+TrigSignatureMoniMT INFO -- #1341875780 Events 20 20 8 - - - - 8
+TrigSignatureMoniMT INFO -- #1341875780 Features 174 - - - -
TrigSignatureMoniMT INFO HLT_j0_vbenfSEP30etSEP34mass35SEP50fbet_L1J20 #4034799151
TrigSignatureMoniMT INFO -- #4034799151 Events 20 20 2 - - - - 2
TrigSignatureMoniMT INFO -- #4034799151 Features 34 - - - -
diff --git a/Trigger/TriggerCommon/TriggerMenuMT/python/HLTMenuConfig/Menu/LS2_v1.py b/Trigger/TriggerCommon/TriggerMenuMT/python/HLTMenuConfig/Menu/LS2_v1.py
index 5d401ba88d776ba24452468d2c857f0f49134f61..f8aebc77b26820423edf0c131a2f5130f6fadffe 100644
--- a/Trigger/TriggerCommon/TriggerMenuMT/python/HLTMenuConfig/Menu/LS2_v1.py
+++ b/Trigger/TriggerCommon/TriggerMenuMT/python/HLTMenuConfig/Menu/LS2_v1.py
@@ -163,6 +163,8 @@ def setupMenu():
ChainProp(name='HLT_3j200_L1J20', groups=MultiJetGroup),
ChainProp(name='HLT_j0_vbenfSEP30etSEP34mass35SEP50fbet_L1J20', groups=SingleJetGroup),
+ # ATR-20624
+ ChainProp(name='HLT_j0_perf_L1J12_EMPTY', stream=['Main'], groups=SingleJetGroup),
]
TriggerFlags.BjetSlice.signatures = TriggerFlags.BjetSlice.signatures() + [