diff --git a/plugins/Goals/API.php b/plugins/Goals/API.php
index <HASH>..<HASH> 100644
--- a/plugins/Goals/API.php
+++ b/plugins/Goals/API.php
@@ -496,7 +496,7 @@ class API extends \Piwik\Plugin\API
                 'idGoal'  => $idGoal,
                 'columns' => $columns,
                 'showAllGoalSpecificMetrics' => $showAllGoalSpecificMetrics,
-                'format_metrics' => Common::getRequestVar('format_metrics', 'bc'),
+                'format_metrics' => !empty($compare) ? 0 : Common::getRequestVar('format_metrics', 'bc'),
             ), $default = []);
             Archiver::$ARCHIVE_DEPENDENT = true;
             $tableSegmented->filter('Piwik\Plugins\Goals\DataTable\Filter\AppendNameToColumnNames',
Fix possible notice when comparing goal data (#<I>)

happened as some metrics might have been formatted twice