diff --git a/src/applications/settings/controller/PhabricatorSettingsAdjustController.php b/src/applications/settings/controller/PhabricatorSettingsAdjustController.php
index 7211431f16..277835a9ef 100644
--- a/src/applications/settings/controller/PhabricatorSettingsAdjustController.php
+++ b/src/applications/settings/controller/PhabricatorSettingsAdjustController.php
@@ -1,17 +1,27 @@
 <?php
 
 final class PhabricatorSettingsAdjustController
   extends PhabricatorController {
 
   public function handleRequest(AphrontRequest $request) {
-    $user = $request->getUser();
+    $viewer = $this->getViewer();
 
-    $prefs = $user->loadPreferences();
-    $prefs->setPreference(
-      $request->getStr('key'),
-      $request->getStr('value'));
-    $prefs->save();
+    $preferences = PhabricatorUserPreferences::loadUserPreferences($viewer);
+
+    $editor = id(new PhabricatorUserPreferencesEditor())
+      ->setActor($viewer)
+      ->setContentSourceFromRequest($request)
+      ->setContinueOnNoEffect(true)
+      ->setContinueOnMissingFields(true);
+
+    $key = $request->getStr('key');
+    $value = $request->getStr('value');
+
+    $xactions = array();
+    $xactions[] = $preferences->newTransaction($key, $value);
+
+    $editor->applyTransactions($preferences, $xactions);
 
     return id(new AphrontAjaxResponse())->setContent(array());
   }
 }