diff --git a/src/ORM/FieldType/MultiValueField.php b/src/ORM/FieldType/MultiValueField.php
index 618ff07..fc27298 100755
--- a/src/ORM/FieldType/MultiValueField.php
+++ b/src/ORM/FieldType/MultiValueField.php
@@ -38,7 +38,7 @@ public function getValue()
         if (is_null($value)) {
             $value = $this->getField('Value');
         }
-        $this->value = $this->unserializeData($value);
+        $this->value = is_string($value) ? $this->unserializeData($value) : $value;
         return $this->value;
     }