diff --git a/phpBB/includes/acp/acp_prune.php b/phpBB/includes/acp/acp_prune.php
index e43f1558b1..dc0f9a345f 100644
--- a/phpBB/includes/acp/acp_prune.php
+++ b/phpBB/includes/acp/acp_prune.php
@@ -331,7 +331,7 @@ class acp_prune
$s_find_active_time .= '';
}
- $s_group_list = '';
+ $s_group_list = '';
$sql = 'SELECT group_id, group_name
FROM ' . GROUPS_TABLE . '
WHERE group_type <> ' . GROUP_SPECIAL . '