diff --git a/Tracking/TrkVertexFitter/TrkVKalVrtFitter/src/CvtParametersBase.cxx b/Tracking/TrkVertexFitter/TrkVKalVrtFitter/src/CvtParametersBase.cxx
index 609cd85e631bd1b19153eb0d59f855e28fdd10f6..f9879ff9a08c99c5a2d289978506638fa74dcb6f 100755
--- a/Tracking/TrkVertexFitter/TrkVKalVrtFitter/src/CvtParametersBase.cxx
+++ b/Tracking/TrkVertexFitter/TrkVKalVrtFitter/src/CvtParametersBase.cxx
@@ -1,5 +1,5 @@
 /*
-  Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration
+  Copyright (C) 2002-2021 CERN for the benefit of the ATLAS collaboration
 */
 
 //   TEMPORARY until track EDM is finalised!!!!
@@ -64,6 +64,7 @@ namespace Trk {
        tmp_refFrameY += perGlobalPos.y() ;
        tmp_refFrameZ += perGlobalPos.z() ;
        TrkMatControl tmpMat;                                    // Here we create structure to control material effects
+       tmpMat.trkSavedLocalVertex.setZero();
        tmpMat.trkRefGlobPos=Amg::Vector3D(perGlobalPos.x(), perGlobalPos.y(), perGlobalPos.z());
        if(m_firstMeasuredPoint){ tmpMat.extrapolationType=0;}   //First measured point strategy
        else{                     tmpMat.extrapolationType=1;}   //Any measured point strategy
@@ -173,6 +174,7 @@ namespace Trk {
        tmp_refFrameY += perGlobalPos.y() ;
        tmp_refFrameZ += perGlobalPos.z() ;
        TrkMatControl tmpMat;                                    // Here we create structure to control material effects
+       tmpMat.trkSavedLocalVertex.setZero();
        tmpMat.trkRefGlobPos=Amg::Vector3D(perGlobalPos.x(), perGlobalPos.y(), perGlobalPos.z()); // on track extrapolation
        tmpMat.extrapolationType=0;   //First measured point strategy
        tmpMat.TrkPnt=nullptr;           //No reference point for neutral track for the moment  !!!
diff --git a/Tracking/TrkVertexFitter/TrkVKalVrtFitter/src/CvtTrackParticle.cxx b/Tracking/TrkVertexFitter/TrkVKalVrtFitter/src/CvtTrackParticle.cxx
index 49dadc22495174083ce4a86837e6e0eb342e7ce2..8d640b9e22e441a4f6e333993a92cabfe0902205 100755
--- a/Tracking/TrkVertexFitter/TrkVKalVrtFitter/src/CvtTrackParticle.cxx
+++ b/Tracking/TrkVertexFitter/TrkVKalVrtFitter/src/CvtTrackParticle.cxx
@@ -61,6 +61,7 @@ namespace Trk {
        tmp_refFrameY += perGlobalPos.y() ;	// Use hit position itself to get more precise
        tmp_refFrameZ += perGlobalPos.z() ;	// magnetic field
        TrkMatControl tmpMat;
+       tmpMat.trkSavedLocalVertex.setZero();
        tmpMat.trkRefGlobPos=Amg::Vector3D( perGlobalPos.x(), perGlobalPos.y(), perGlobalPos.z());
        tmpMat.extrapolationType=2;                   // Perigee point strategy
        tmpMat.TrkPnt=mPer;
@@ -157,6 +158,7 @@ namespace Trk {
        tmp_refFrameY += perGlobalPos.y() ;	// Use hit position itself to get more precise
        tmp_refFrameZ += perGlobalPos.z() ;	// magnetic field
        TrkMatControl tmpMat;
+       tmpMat.trkSavedLocalVertex.setZero();
        tmpMat.trkRefGlobPos=Amg::Vector3D( perGlobalPos.x(), perGlobalPos.y(), perGlobalPos.z());
        tmpMat.extrapolationType=2;                   // Perigee point strategy
        tmpMat.TrkPnt=nullptr;           //No reference point for neutral particle for the moment