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-rw-r--r--phpBB/includes/acp/acp_attachments.php2
1 files changed, 1 insertions, 1 deletions
diff --git a/phpBB/includes/acp/acp_attachments.php b/phpBB/includes/acp/acp_attachments.php
index 74373af86b..956afdd7ae 100644
--- a/phpBB/includes/acp/acp_attachments.php
+++ b/phpBB/includes/acp/acp_attachments.php
@@ -451,7 +451,7 @@ class acp_attachments
{
$sql = 'SELECT group_id
FROM ' . EXTENSION_GROUPS_TABLE . "
- WHERE LOWER(group_name) = '" . $db->sql_escape(strtolower($new_group_name)) . "'";
+ WHERE LOWER(group_name) = '" . $db->sql_escape(utf8_strtolower($new_group_name)) . "'";
$result = $db->sql_query($sql);
if ($db->sql_fetchrow($result))