diff --git a/src/Plugin/UiPatterns/PropType/StringPropType.php b/src/Plugin/UiPatterns/PropType/StringPropType.php
index f884d3b6c509e12b3ac96e671f98b9c8f081a2f6..e3581382c78356e5fb7a34fb1e11f4e0641747c8 100644
--- a/src/Plugin/UiPatterns/PropType/StringPropType.php
+++ b/src/Plugin/UiPatterns/PropType/StringPropType.php
@@ -37,6 +37,7 @@ class StringPropType extends PropTypePluginBase {
       'url' => $value,
       'identifier' => $value,
       'string' => $value,
+      'default' => (string) $value,
     };
   }