diff --git a/InnerDetector/InDetDetDescr/InDetGeoModelUtils/InDetGeoModelUtils/TopLevelPlacements.h b/InnerDetector/InDetDetDescr/InDetGeoModelUtils/InDetGeoModelUtils/TopLevelPlacements.h
index 51e07de7827d9f27162bf851b1972c4379bad31a..25eb359371b4a91c12c66f2dd8b6ece0fc4a1a50 100755
--- a/InnerDetector/InDetDetDescr/InDetGeoModelUtils/InDetGeoModelUtils/TopLevelPlacements.h
+++ b/InnerDetector/InDetDetDescr/InDetGeoModelUtils/InDetGeoModelUtils/TopLevelPlacements.h
@@ -1,5 +1,5 @@
 /*
-  Copyright (C) 2002-2018 CERN for the benefit of the ATLAS collaboration
+  Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration
 */
 
 #ifndef INDETGEOMODELUTILS_TOPLEVELPLACEMENTS_H
@@ -41,7 +41,7 @@ private:
   std::map<std::string, Part *> m_parts;
   bool m_noTopLevelTable;
 
-  static GeoTrf::Transform3D s_identityTransform;
+  static const GeoTrf::Transform3D s_identityTransform;
 };
 
 #endif // INDETGEOMODELUTILS_TOPLEVELPLACEMENTS_H
diff --git a/InnerDetector/InDetDetDescr/InDetGeoModelUtils/src/TopLevelPlacements.cxx b/InnerDetector/InDetDetDescr/InDetGeoModelUtils/src/TopLevelPlacements.cxx
index c67422760ef78da239afd8055cb02051cb7a4263..272f6baff632e069ade7205056398382a96a5412 100755
--- a/InnerDetector/InDetDetDescr/InDetGeoModelUtils/src/TopLevelPlacements.cxx
+++ b/InnerDetector/InDetDetDescr/InDetGeoModelUtils/src/TopLevelPlacements.cxx
@@ -1,5 +1,5 @@
 /*
-   Copyright (C) 2002-2018 CERN for the benefit of the ATLAS collaboration
+   Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration
  */
 
 #include "InDetGeoModelUtils/TopLevelPlacements.h"
@@ -8,7 +8,7 @@
 #include "RDBAccessSvc/IRDBRecord.h"
 #include <iostream>
 
-GeoTrf::Transform3D TopLevelPlacements::s_identityTransform = GeoTrf::Transform3D::Identity();
+const GeoTrf::Transform3D TopLevelPlacements::s_identityTransform = GeoTrf::Transform3D::Identity();
 
 TopLevelPlacements::TopLevelPlacements(IRDBRecordset_ptr topLevelTable)
   : m_noTopLevelTable(true) {