diff --git a/src/Kunstmaan/TranslatorBundle/Service/Translator/Loader.php b/src/Kunstmaan/TranslatorBundle/Service/Translator/Loader.php
index f502cf5a60..2a27675950 100644
--- a/src/Kunstmaan/TranslatorBundle/Service/Translator/Loader.php
+++ b/src/Kunstmaan/TranslatorBundle/Service/Translator/Loader.php
@@ -24,7 +24,11 @@ public function load($resource, $locale, $domain = 'messages')
             $catalogue = new MessageCatalogue($locale);
             $translations = $this->translationRepository->findBy(['locale' => $locale]);
             foreach ($translations as $translation) {
-                $catalogue->set($translation->getKeyword(), $translation->getText(), $translation->getDomain());
+                $catalogue->set(
+                    (string) $translation->getKeyword(),
+                    (string) $translation->getText(),
+                    (string) $translation->getDomain()
+                );
             }
             $this->catalogues[$locale] = $catalogue;
         } else {