diff --git a/lib/private/DB/QueryBuilder/QueryBuilder.php b/lib/private/DB/QueryBuilder/QueryBuilder.php
index 56c860bc42c13..e45ab40516b8e 100644
--- a/lib/private/DB/QueryBuilder/QueryBuilder.php
+++ b/lib/private/DB/QueryBuilder/QueryBuilder.php
@@ -1339,6 +1339,8 @@ public function getTableName($table) {
 	/**
 	 * Returns the table name with database prefix as needed by the implementation
 	 *
+	 * Was protected until version 30.
+  	 *
 	 * @param string $table
 	 * @return string
 	 */