diff --git a/lib/Service/SynchronizationService.php b/lib/Service/SynchronizationService.php
index 4e01954..37b40f1 100644
--- a/lib/Service/SynchronizationService.php
+++ b/lib/Service/SynchronizationService.php
@@ -270,7 +270,7 @@ private function fetchExtraDataForObject(Synchronization $synchronization, array
         $extraData = $this->getObjectFromSource($synchronization, $endpoint);
 
         // Temporary fix,
-        if ($extraDataConfig['extraDataConfigPerResult']) {
+        if (isset($extraDataConfig['extraDataConfigPerResult']) === true) {
             $dotObject = new Dot($extraData);
             $results = $dotObject->get($extraDataConfig['resultsLocation']);