diff --git a/Trigger/TrigAlgorithms/TrigMuonEF/src/TrigMuonEFStandaloneTrackTool.cxx b/Trigger/TrigAlgorithms/TrigMuonEF/src/TrigMuonEFStandaloneTrackTool.cxx
index cd3f0bea3adddbec508fda9b123a6e492ae40e1d..6fd8c2c3f0a7313c449b8378aa639794a480ed18 100644
--- a/Trigger/TrigAlgorithms/TrigMuonEF/src/TrigMuonEFStandaloneTrackTool.cxx
+++ b/Trigger/TrigAlgorithms/TrigMuonEF/src/TrigMuonEFStandaloneTrackTool.cxx
@@ -1734,7 +1734,7 @@ TrigMuonEFStandaloneTrackTool::buildTracks(const MuonSegmentCombinationCollectio
 	else
 	  chi2prob = 0.;
       }
-      double eta =  -log(fabs(tan(theta*0.5)));
+      double eta =  -log(tan(theta*0.5));
       
       unsigned short int nRpcEtaHits = 0;
       unsigned short int nRpcPhiHits = 0;
@@ -1903,7 +1903,7 @@ TrigMuonEFStandaloneTrackTool::extrapolate(const xAOD::TrackParticleContainer* s
       else
 	chi2prob = 0.;
     }
-    double eta =  -log(fabs(tan(theta*0.5)));
+    double eta =  -log(tan(theta*0.5));
     
     unsigned short int nRpcEtaHits = 0;
     unsigned short int nRpcPhiHits = 0;