diff --git a/src/applications/differential/conduit/ConduitAPI_differential_querydiffs_Method.php b/src/applications/differential/conduit/ConduitAPI_differential_querydiffs_Method.php
index 25f233e947..70716afaab 100644
--- a/src/applications/differential/conduit/ConduitAPI_differential_querydiffs_Method.php
+++ b/src/applications/differential/conduit/ConduitAPI_differential_querydiffs_Method.php
@@ -13,7 +13,7 @@ final class ConduitAPI_differential_querydiffs_Method
   public function defineParamTypes() {
     return array(
       'ids' => 'optional list<uint>',
-      'revisonIDs' => 'optional list<uint>',
+      'revisionIDs' => 'optional list<uint>',
     );
   }
 
@@ -28,8 +28,8 @@ final class ConduitAPI_differential_querydiffs_Method
   protected function execute(ConduitAPIRequest $request) {
     $ids = $request->getValue('ids', array());
     $revision_ids = $request->getValue('revisionIDs', array());
+
     $diffs = array();
-    $diff_dicts = array();
     if ($ids || $revision_ids) {
       $diffs = id(new DifferentialDiffQuery())
         ->setViewer($request->getUser())