1 files changed, 1 insertions, 2 deletions
diff --git a/plugins/DevicesDetection/Archiver.php b/plugins/DevicesDetection/Archiver.php
index ea63485017..9f268f85a0 100644
--- a/plugins/DevicesDetection/Archiver.php
+++ b/plugins/DevicesDetection/Archiver.php
@@ -87,8 +87,7 @@ class Archiver extends \Piwik\Plugin\Archiver
             }
 
             while ($conversionRow = $query->fetch()) {
-
-                $metrics->sumMetricsGoals($conversionRow[$labelSQL], $conversionRow);
+                $metrics->sumMetricsGoals(isset($conversionRow[$labelSQL]) ? $conversionRow[$labelSQL] : null, $conversionRow);
             }
             $metrics->enrichMetricsWithConversions();
         }