diff --git a/phpBB/includes/cron/task/core/prune_forum.php b/phpBB/includes/cron/task/core/prune_forum.php
index 5efcde4102..440dc5e358 100644
--- a/phpBB/includes/cron/task/core/prune_forum.php
+++ b/phpBB/includes/cron/task/core/prune_forum.php
@@ -39,7 +39,7 @@ class phpbb_cron_task_core_prune_forum extends phpbb_cron_task_base implements p
 	* and a database query will be performed to load the necessary information
 	* about the forum.
 	*/
-	public function __construct($forum_data=null)
+	public function __construct($forum_data = null)
 	{
 		global $db;
 		if ($forum_data)