diff --git a/LArCalorimeter/LArRecEvent/LArRecEvent/ATLAS_CHECK_THREAD_SAFETY b/LArCalorimeter/LArRecEvent/LArRecEvent/ATLAS_CHECK_THREAD_SAFETY
new file mode 100644
index 0000000000000000000000000000000000000000..6205ca654f0deed167ec7d1c3b17197cc0327212
--- /dev/null
+++ b/LArCalorimeter/LArRecEvent/LArRecEvent/ATLAS_CHECK_THREAD_SAFETY
@@ -0,0 +1 @@
+LArCalorimeter/LArRecEvent