diff --git a/LArCalorimeter/LArElecCalib/LArElecCalib/ATLAS_CHECK_THREAD_SAFETY b/LArCalorimeter/LArElecCalib/LArElecCalib/ATLAS_CHECK_THREAD_SAFETY
new file mode 100644
index 0000000000000000000000000000000000000000..347bf36b9d2912d97f3b83526279dfb6d71b583a
--- /dev/null
+++ b/LArCalorimeter/LArElecCalib/LArElecCalib/ATLAS_CHECK_THREAD_SAFETY
@@ -0,0 +1 @@
+LArCalorimeter/LArElecCalib