diff --git a/src/applications/ponder/query/PonderQuestionQuery.php b/src/applications/ponder/query/PonderQuestionQuery.php
--- a/src/applications/ponder/query/PonderQuestionQuery.php
+++ b/src/applications/ponder/query/PonderQuestionQuery.php
@@ -129,7 +129,7 @@
     return $questions;
   }
 
-  private function buildJoinsClause(AphrontDatabaseConnection $conn_r) {
+  protected function buildJoinClause(AphrontDatabaseConnection $conn_r) {
     $joins = array();
 
     if ($this->answererPHIDs) {
diff --git a/src/applications/ponder/query/PonderQuestionSearchEngine.php b/src/applications/ponder/query/PonderQuestionSearchEngine.php
--- a/src/applications/ponder/query/PonderQuestionSearchEngine.php
+++ b/src/applications/ponder/query/PonderQuestionSearchEngine.php
@@ -96,7 +96,7 @@
           array($this->requireViewer()->getPHID()));
       case 'answered':
         return $query->setParameter(
-          'answererPHIDs',
+          'answerers',
           array($this->requireViewer()->getPHID()));
     }