diff --git a/TileCalorimeter/TileG4/TileG4Interfaces/TileG4Interfaces/ATLAS_CHECK_THREAD_SAFETY b/TileCalorimeter/TileG4/TileG4Interfaces/TileG4Interfaces/ATLAS_CHECK_THREAD_SAFETY
new file mode 100644
index 0000000000000000000000000000000000000000..efb26618a433c76237fd101cde1b970037cd0078
--- /dev/null
+++ b/TileCalorimeter/TileG4/TileG4Interfaces/TileG4Interfaces/ATLAS_CHECK_THREAD_SAFETY
@@ -0,0 +1 @@
+TileCalorimeter/TileG4/TileG4Interfaces
diff --git a/TileCalorimeter/TileG4/TileGeoG4SD/TileGeoG4SD/ATLAS_CHECK_THREAD_SAFETY b/TileCalorimeter/TileG4/TileGeoG4SD/TileGeoG4SD/ATLAS_CHECK_THREAD_SAFETY
new file mode 100644
index 0000000000000000000000000000000000000000..b034109d97157e7b6a951ecf6e067b8ddf2b5168
--- /dev/null
+++ b/TileCalorimeter/TileG4/TileGeoG4SD/TileGeoG4SD/ATLAS_CHECK_THREAD_SAFETY
@@ -0,0 +1 @@
+TileCalorimeter/TileG4/TileGeoG4SD