diff --git a/public/typo3conf/ext/ep_products/Classes/Controller/ConceptController.php b/public/typo3conf/ext/ep_products/Classes/Controller/ConceptController.php
index 7e49d253..2fee84c6 100644
--- a/public/typo3conf/ext/ep_products/Classes/Controller/ConceptController.php
+++ b/public/typo3conf/ext/ep_products/Classes/Controller/ConceptController.php
@@ -67,7 +67,9 @@ class ConceptController extends ActionController
             $concept = $this->conceptRepository->findByIdentifier($conceptUid);
         }
         $teaserConceptUids = GeneralUtility::trimExplode(',', $this->settings['additionalConceptUids']);
-        array_unshift($teaserConceptUids, $concept->getUid());
+        if (null !== $concept) {
+            array_unshift($teaserConceptUids, $concept->getUid());
+        }
         $filterSettings = new FilterSettings();
         $filterSettings->setConceptUids($teaserConceptUids);
         $excludedConceptUids = GeneralUtility::trimExplode(',', $this->settings['excludedConceptUids'], true);