diff --git a/ext/mysqlnd/mysqlnd.c b/ext/mysqlnd/mysqlnd.c
index 9a1eee23d3f..be9018325d7 100644
--- a/ext/mysqlnd/mysqlnd.c
+++ b/ext/mysqlnd/mysqlnd.c
@@ -446,7 +446,6 @@ PHPAPI void _mysqlnd_restart_psession(MYSQLND *conn TSRMLS_DC)
 PHPAPI void _mysqlnd_end_psession(MYSQLND *conn TSRMLS_DC)
 {
 	DBG_ENTER("_mysqlnd_end_psession");
-	/* The thd zval cache is always freed on request shutdown, so this has happened already */
 	DBG_VOID_RETURN;
 }
 /* }}} */