diff --git a/TrackingTools/KalmanUpdators/interface/MRHChi2MeasurementEstimator.h b/TrackingTools/KalmanUpdators/interface/MRHChi2MeasurementEstimator.h
index 330a47beed8..8360eedfd2d 100644
--- a/TrackingTools/KalmanUpdators/interface/MRHChi2MeasurementEstimator.h
+++ b/TrackingTools/KalmanUpdators/interface/MRHChi2MeasurementEstimator.h
@@ -7,7 +7,7 @@ class SiTrackerMultiRecHitUpdator;
 
 class MRHChi2MeasurementEstimator final : public Chi2MeasurementEstimatorBase {
 public:
- using Chi2MeasurementEstimatorBase::estimate; 
+  using Chi2MeasurementEstimatorBase::estimate;
   /** Construct with cuts on chi2 and nSigma.
    *  The cut on Chi2 is used to define the acceptance of RecHits.
    *  The errors of the trajectory state are multiplied by nSigma