diff --git a/mysql.tmpfiles.d.in b/mysql.tmpfiles.d.in
index d2c4b31..9e6b6e8 100644
--- a/mysql.tmpfiles.d.in
+++ b/mysql.tmpfiles.d.in
@@ -1 +1,3 @@
+# Do not edit this file.
+# To override this, put /etc/tmpfiles.d/mariadb.conf instead.
 d @PID_FILE_DIR@ 0755 mysql mysql -