diff --git a/src/applications/ponder/phid/PonderAnswerPHIDType.php b/src/applications/ponder/phid/PonderAnswerPHIDType.php
--- a/src/applications/ponder/phid/PonderAnswerPHIDType.php
+++ b/src/applications/ponder/phid/PonderAnswerPHIDType.php
@@ -8,6 +8,10 @@
     return pht('Ponder Answer');
   }
 
+  public function getPHIDTypeApplicationClass() {
+    return 'PhabricatorPonderApplication';
+  }
+
   public function newObject() {
     return new PonderAnswer();
   }