diff --git a/Trigger/TriggerCommon/TriggerMenuMT/python/HLTMenuConfig/Muon/MuonSetup.py b/Trigger/TriggerCommon/TriggerMenuMT/python/HLTMenuConfig/Muon/MuonSetup.py
index 9392b304fbed69ec7e6862b6bb26d5509f9220fe..26a532daa60cc385c529edcfbdd46253db682dff 100644
--- a/Trigger/TriggerCommon/TriggerMenuMT/python/HLTMenuConfig/Muon/MuonSetup.py
+++ b/Trigger/TriggerCommon/TriggerMenuMT/python/HLTMenuConfig/Muon/MuonSetup.py
@@ -238,7 +238,6 @@ def makeMuonPrepDataAlgs(RoIs="MURoIs", forFullScan=False):
 def muFastRecoSequence( RoIs ):
 
   from AthenaCommon.AppMgr import ToolSvc
-  from AthenaCommon.DetFlags import DetFlags
   from AthenaCommon.CFElements import parOR
 
   muFastRecoSequence = parOR("l2MuViewNode")