diff --git a/TileCalorimeter/TileCosmicAlgs/TileCosmicAlgs/ATLAS_CHECK_THREAD_SAFETY b/TileCalorimeter/TileCosmicAlgs/TileCosmicAlgs/ATLAS_CHECK_THREAD_SAFETY
new file mode 100644
index 0000000000000000000000000000000000000000..91aa5f8dc5e792b7fd5027acab2ca13b1baeece5
--- /dev/null
+++ b/TileCalorimeter/TileCosmicAlgs/TileCosmicAlgs/ATLAS_CHECK_THREAD_SAFETY
@@ -0,0 +1 @@
+TileCalorimeter/TileCosmicAlgs
diff --git a/TileCalorimeter/TileCosmicAlgs/TileCosmicAlgs/TileMuonFitter.h b/TileCalorimeter/TileCosmicAlgs/TileCosmicAlgs/TileMuonFitter.h
index d89f20351cef9034fd98f909f13fa185f6dc0ca9..46a24b8d19bf24372267c914adb43b6dd74f6d43 100755
--- a/TileCalorimeter/TileCosmicAlgs/TileCosmicAlgs/TileMuonFitter.h
+++ b/TileCalorimeter/TileCosmicAlgs/TileCosmicAlgs/TileMuonFitter.h
@@ -1,5 +1,5 @@
 /*
-  Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
+  Copyright (C) 2002-2022 CERN for the benefit of the ATLAS collaboration
 */
 
 #ifndef TILECOSMICALGS_TILEMUONFITTER_H
@@ -259,7 +259,7 @@ class TileMuonFitter: public AthAlgorithm {
     int m_maxTopIndex;
     bool m_reg1to2;
 
-    static CaloCell_ID::SUBCALO m_caloIndex;
+    static const CaloCell_ID::SUBCALO m_caloIndex;
 
     SG::ReadHandleKey<CaloCellContainer> m_cellContainerKey{this, "CaloCellContainer", "AllCalo",
                                                             "Input CaloCellContainer name" };
diff --git a/TileCalorimeter/TileCosmicAlgs/src/TileMuonFitter.cxx b/TileCalorimeter/TileCosmicAlgs/src/TileMuonFitter.cxx
index bcb193fbbb5c89325c56f7e89df632c9540ba008..788ab6a902952bdd80246e71a9f54f243bd4e174 100755
--- a/TileCalorimeter/TileCosmicAlgs/src/TileMuonFitter.cxx
+++ b/TileCalorimeter/TileCosmicAlgs/src/TileMuonFitter.cxx
@@ -1,5 +1,5 @@
 /*
-  Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
+  Copyright (C) 2002-2022 CERN for the benefit of the ATLAS collaboration
 */
 
 /********************************************************************
@@ -87,7 +87,7 @@ using CLHEP::c_light;
 
 using namespace ROOT::Minuit2;
 
-CaloCell_ID::SUBCALO TileMuonFitter::m_caloIndex = CaloCell_ID::TILE;
+const CaloCell_ID::SUBCALO TileMuonFitter::m_caloIndex = CaloCell_ID::TILE;
 
 //
 // Constructor