diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -2924,6 +2924,7 @@
     'PhabricatorIndexEngine' => 'applications/search/index/PhabricatorIndexEngine.php',
     'PhabricatorIndexEngineExtension' => 'applications/search/index/PhabricatorIndexEngineExtension.php',
     'PhabricatorIndexEngineExtensionModule' => 'applications/search/index/PhabricatorIndexEngineExtensionModule.php',
+    'PhabricatorIndexableInterface' => 'applications/search/interface/PhabricatorIndexableInterface.php',
     'PhabricatorInfrastructureTestCase' => '__tests__/PhabricatorInfrastructureTestCase.php',
     'PhabricatorInlineCommentController' => 'infrastructure/diff/PhabricatorInlineCommentController.php',
     'PhabricatorInlineCommentInterface' => 'infrastructure/diff/interface/PhabricatorInlineCommentInterface.php',
@@ -8025,6 +8026,7 @@
     'PhabricatorFulltextEngineExtension' => 'Phobject',
     'PhabricatorFulltextEngineExtensionModule' => 'PhabricatorConfigModule',
     'PhabricatorFulltextIndexEngineExtension' => 'PhabricatorIndexEngineExtension',
+    'PhabricatorFulltextInterface' => 'PhabricatorIndexableInterface',
     'PhabricatorFulltextResultSet' => 'Phobject',
     'PhabricatorFulltextStorageEngine' => 'Phobject',
     'PhabricatorFulltextToken' => 'Phobject',
@@ -8299,6 +8301,7 @@
     'PhabricatorNavigationRemarkupRule' => 'PhutilRemarkupRule',
     'PhabricatorNeverTriggerClock' => 'PhabricatorTriggerClock',
     'PhabricatorNgramsIndexEngineExtension' => 'PhabricatorIndexEngineExtension',
+    'PhabricatorNgramsInterface' => 'PhabricatorIndexableInterface',
     'PhabricatorNotificationBuilder' => 'Phobject',
     'PhabricatorNotificationClearController' => 'PhabricatorNotificationController',
     'PhabricatorNotificationClient' => 'Phobject',
diff --git a/src/applications/search/interface/PhabricatorFulltextInterface.php b/src/applications/search/interface/PhabricatorFulltextInterface.php
--- a/src/applications/search/interface/PhabricatorFulltextInterface.php
+++ b/src/applications/search/interface/PhabricatorFulltextInterface.php
@@ -1,6 +1,7 @@
 <?php
 
-interface PhabricatorFulltextInterface {
+interface PhabricatorFulltextInterface
+  extends PhabricatorIndexableInterface {
 
   public function newFulltextEngine();
 
diff --git a/src/applications/search/interface/PhabricatorIndexableInterface.php b/src/applications/search/interface/PhabricatorIndexableInterface.php
new file mode 100644
--- /dev/null
+++ b/src/applications/search/interface/PhabricatorIndexableInterface.php
@@ -0,0 +1,3 @@
+<?php
+
+interface PhabricatorIndexableInterface {}
diff --git a/src/applications/search/interface/PhabricatorNgramsInterface.php b/src/applications/search/interface/PhabricatorNgramsInterface.php
--- a/src/applications/search/interface/PhabricatorNgramsInterface.php
+++ b/src/applications/search/interface/PhabricatorNgramsInterface.php
@@ -1,6 +1,7 @@
 <?php
 
-interface PhabricatorNgramsInterface {
+interface PhabricatorNgramsInterface
+  extends PhabricatorIndexableInterface {
 
   public function newNgrams();
 
diff --git a/src/applications/search/management/PhabricatorSearchManagementIndexWorkflow.php b/src/applications/search/management/PhabricatorSearchManagementIndexWorkflow.php
--- a/src/applications/search/management/PhabricatorSearchManagementIndexWorkflow.php
+++ b/src/applications/search/management/PhabricatorSearchManagementIndexWorkflow.php
@@ -213,7 +213,7 @@
 
   private function loadPHIDsByTypes($type) {
     $objects = id(new PhutilClassMapQuery())
-      ->setAncestorClass('PhabricatorFulltextInterface')
+      ->setAncestorClass('PhabricatorIndexableInterface')
       ->execute();
 
     $normalized_type = phutil_utf8_strtolower($type);