diff --git a/reactos/apps/tests/thread/thread.c b/reactos/apps/tests/thread/thread.c
index 2c107507315..2758b6c9530 100644
--- a/reactos/apps/tests/thread/thread.c
+++ b/reactos/apps/tests/thread/thread.c
@@ -1,3 +1,5 @@
+/* $Id */
+
 #include <stdio.h>
 #include <windows.h>