diff --git a/phpBB/phpbb/feed/helper.php b/phpBB/phpbb/feed/helper.php
index 8261027eb0..8e50f5135f 100644
--- a/phpBB/phpbb/feed/helper.php
+++ b/phpBB/phpbb/feed/helper.php
@@ -97,7 +97,7 @@ class helper
 		if (empty($offset_string))
 		{
 			$zone_offset = $this->user->create_datetime()->getOffset();
-			$offset_string = phpbb_format_timezone_offset($zone_offset);
+			$offset_string = phpbb_format_timezone_offset($zone_offset, true);
 		}
 
 		return gmdate("Y-m-d\TH:i:s", $time + $zone_offset) . $offset_string;