diff --git a/src/applications/maniphest/query/ManiphestTaskQuery.php b/src/applications/maniphest/query/ManiphestTaskQuery.php
--- a/src/applications/maniphest/query/ManiphestTaskQuery.php
+++ b/src/applications/maniphest/query/ManiphestTaskQuery.php
@@ -560,7 +560,8 @@
     // NOTE: Setting this to something larger than 2^53 will raise errors in
     // ElasticSearch, and billions of results won't fit in memory anyway.
     $fulltext_query->setParameter('limit', 100000);
-    $fulltext_query->setParameter('type', ManiphestTaskPHIDType::TYPECONST);
+    $fulltext_query->setParameter('types',
+      array(ManiphestTaskPHIDType::TYPECONST));
 
     $engine = PhabricatorSearchEngineSelector::newSelector()->newEngine();
     $fulltext_results = $engine->executeSearch($fulltext_query);