diff --git a/src/applications/differential/editor/DifferentialRevisionEditEngine.php b/src/applications/differential/editor/DifferentialRevisionEditEngine.php
--- a/src/applications/differential/editor/DifferentialRevisionEditEngine.php
+++ b/src/applications/differential/editor/DifferentialRevisionEditEngine.php
@@ -29,7 +29,7 @@
     return 'PhabricatorDifferentialApplication';
   }
 
-  protected function supportsEditEngineConfiguration() {
+  public function isEngineConfigurable() {
     return false;
   }