diff --git a/Trigger/TrigSteer/L1Decoder/python/L1DecoderConfig.py b/Trigger/TrigSteer/L1Decoder/python/L1DecoderConfig.py
index a5ebc2e008b790e548601de1e2e0caf1dacde2a4..422f28bd146681137c8776c941a84716fefb3897 100644
--- a/Trigger/TrigSteer/L1Decoder/python/L1DecoderConfig.py
+++ b/Trigger/TrigSteer/L1Decoder/python/L1DecoderConfig.py
@@ -163,8 +163,9 @@ def L1DecoderCfg(flags):
     decoderAlg.DoCostMonitoring = flags.Trigger.CostMonitoring.doCostMonitoring
     decoderAlg.CostMonitoringChain = flags.Trigger.CostMonitoring.chain
 
-    from TrigConfigSvc.TrigConfigSvcConfig import TrigConfigSvcCfg
+    from TrigConfigSvc.TrigConfigSvcCfg import TrigConfigSvcCfg, HLTPrescaleCondAlgCfg
     acc.merge( TrigConfigSvcCfg( flags ) )
+    acc.merge( HLTPrescaleCondAlgCfg( flags ) )
 
     # Add the algorithm producing the input RoIBResult
     from TrigT1ResultByteStream.TrigT1ResultByteStreamConfig import RoIBResultDecoderCfg, L1TriggerResultMakerCfg
diff --git a/Trigger/TriggerCommon/TriggerJobOpts/python/TriggerConfigFlags.py b/Trigger/TriggerCommon/TriggerJobOpts/python/TriggerConfigFlags.py
index 52666aaf1af24d6eec6893f3858b2fa189b9b15b..59f3ea083c3c53dc37fd4426027fbdb7f614e429 100644
--- a/Trigger/TriggerCommon/TriggerJobOpts/python/TriggerConfigFlags.py
+++ b/Trigger/TriggerCommon/TriggerJobOpts/python/TriggerConfigFlags.py
@@ -89,8 +89,9 @@ def createTriggerFlags():
     # use or not frontier proxies
     flags.addFlag('Trigger.triggerUseFrontier', False)
 
-    # the configuration name, see TriggerFlags for full info
-    flags.addFlag('Trigger.triggerConfig', 'MCRECO:DEFAULT')
+    # the configuration source
+    # see https://twiki.cern.ch/twiki/bin/view/Atlas/TriggerConfigFlag
+    flags.addFlag('Trigger.triggerConfig', 'FILE')
 
     # name of the trigger menu
     flags.addFlag('Trigger.triggerMenuSetup', 'LS2_v1')