diff --git a/src/applications/differential/controller/DifferentialRevisionDetailRenderer.php b/src/applications/differential/controller/DifferentialRevisionDetailRenderer.php
index 670c9a78df..55502c71c0 100644
--- a/src/applications/differential/controller/DifferentialRevisionDetailRenderer.php
+++ b/src/applications/differential/controller/DifferentialRevisionDetailRenderer.php
@@ -1,9 +1,19 @@
 <?php
 
 abstract class DifferentialRevisionDetailRenderer {
+  private $user;
   private $diff;
   private $vsDiff;
 
+  final public function setUser(PhabricatorUser $user) {
+    $this->user = $user;
+    return $this;
+  }
+
+  final protected function getUser() {
+    return $this->user;
+  }
+
   final public function setDiff(DifferentialDiff $diff) {
     $this->diff = $diff;
     return $this;
diff --git a/src/applications/differential/controller/DifferentialRevisionViewController.php b/src/applications/differential/controller/DifferentialRevisionViewController.php
index 480a9441e4..da1842f6b9 100644
--- a/src/applications/differential/controller/DifferentialRevisionViewController.php
+++ b/src/applications/differential/controller/DifferentialRevisionViewController.php
@@ -238,6 +238,7 @@ final class DifferentialRevisionViewController extends DifferentialController {
       // TODO: build a better version of the action links and deprecate the
       // whole DifferentialRevisionDetailRenderer class.
       $custom_renderer = newv($custom_renderer_class, array());
+      $custom_renderer->setUser($user);
       $custom_renderer->setDiff($target);
       if ($diff_vs) {
         $custom_renderer->setVSDiff($diffs[$diff_vs]);