diff --git a/DQMOffline/Trigger/python/SiPixel_OfflineMonitoring_cff.py b/DQMOffline/Trigger/python/SiPixel_OfflineMonitoring_cff.py
index 35a90dd1fa226..6c9814bfb2074 100644
--- a/DQMOffline/Trigger/python/SiPixel_OfflineMonitoring_cff.py
+++ b/DQMOffline/Trigger/python/SiPixel_OfflineMonitoring_cff.py
@@ -7,7 +7,7 @@
 
 hltSiPixelClusterShapeCache = siPixelClusterShapeCache.clone(src = 'hltSiPixelClusters')
 hltrefittedForPixelDQM = refittedForPixelDQM.clone(src ='hltMergedTracks',
-                                                   TTRHBuilder = cms.string('WithTrackAngle')) # no templates at HLT
+                                                   TTRHBuilder = 'WithTrackAngle') # no templates at HLT
  
 
 sipixelMonitorHLTsequence = cms.Sequence(