diff --git a/sources/Forms/FormType/Base/ChoiceFormType.php b/sources/Forms/FormType/Base/ChoiceFormType.php
index c93f000a9..f1559cfcb 100644
--- a/sources/Forms/FormType/Base/ChoiceFormType.php
+++ b/sources/Forms/FormType/Base/ChoiceFormType.php
@@ -94,7 +94,7 @@ class ChoiceFormType extends AbstractType
 			if ($oEvent->getData() === null) {
 				$oFirstElement = array_shift($options['choices']);
 				if ($oFirstElement !== null) {
-					$oEvent->setData($oFirstElement);
+					$oEvent->setData(strval($oFirstElement));
 				}
 			}
 		}