diff --git a/src/applications/transactions/xaction/PhabricatorEditEngineDefaultTransaction.php b/src/applications/transactions/xaction/PhabricatorEditEngineDefaultTransaction.php
index 7b980cdb1a..38011058b6 100644
--- a/src/applications/transactions/xaction/PhabricatorEditEngineDefaultTransaction.php
+++ b/src/applications/transactions/xaction/PhabricatorEditEngineDefaultTransaction.php
@@ -1,71 +1,71 @@
 <?php
 
 final class PhabricatorEditEngineDefaultTransaction
   extends PhabricatorEditEngineTransactionType {
 
   const TRANSACTIONTYPE = 'editengine.config.default';
 
   public function generateOldValue($object) {
     $field_key = $this->getMetadataValue('field.key');
     return $object->getFieldDefault($field_key);
   }
 
   public function applyInternalEffects($object, $value) {
     $field_key = $this->getMetadataValue('field.key');
     $object->setFieldDefault($field_key, $value);
   }
 
   public function getTitle() {
     $key = $this->getMetadataValue('field.key');
     $object = $this->getObject();
     $engine = $object->getEngine();
     $fields = $engine->getFieldsForConfig($object);
     $field = idx($fields, $key);
 
     if (!$field) {
       return pht(
         '%s changed the default values for field %s.',
         $this->renderAuthor(),
         $this->renderValue($key));
     }
 
     return pht(
       '%s changed the default value for field %s.',
       $this->renderAuthor(),
       $this->renderValue($field->getLabel()));
   }
 
   public function hasChangeDetailView() {
     return true;
   }
 
   public function newChangeDetailView() {
     $viewer = $this->getViewer();
     $old = $this->renderDefaultValueAsFallbackText($this->getOldValue());
     $new = $this->renderDefaultValueAsFallbackText($this->getNewValue());
 
     return id(new PhabricatorApplicationTransactionTextDiffDetailView())
       ->setViewer($viewer)
       ->setOldText($old)
       ->setNewText($new);
   }
 
   private function renderDefaultValueAsFallbackText($default_value) {
     // See T13319. When rendering an "alice changed the default value for
     // field X." story on custom forms, we may fall back to a generic
     // rendering. Try to present the value change in a comprehensible way
     // even if it isn't especially human readable (for example, it may
     // contain PHIDs or other internal identifiers).
 
     if (is_scalar($default_value) || is_null($default_value)) {
       return $default_value;
     }
 
     if (phutil_is_natural_list($default_value)) {
       return id(new PhutilJSON())->encodeAsList($default_value);
     }
 
-    return id(new PhutilJSON())->encodeAsObject($default_value);
+    return id(new PhutilJSON())->encodeFormatted($default_value);
   }
 
 }