diff --git a/src/applications/project/engine/PhabricatorProjectProfilePanelEngine.php b/src/applications/project/engine/PhabricatorProjectProfilePanelEngine.php
index 3a34b6c80c..2f434a634b 100644
--- a/src/applications/project/engine/PhabricatorProjectProfilePanelEngine.php
+++ b/src/applications/project/engine/PhabricatorProjectProfilePanelEngine.php
@@ -1,46 +1,52 @@
 <?php
 
 final class PhabricatorProjectProfilePanelEngine
   extends PhabricatorProfilePanelEngine {
 
   protected function isPanelEngineConfigurable() {
     return true;
   }
 
   protected function getPanelURI($path) {
     $project = $this->getProfileObject();
     $id = $project->getID();
     return "/project/{$id}/panel/{$path}";
   }
 
   protected function getBuiltinProfilePanels($object) {
     $panels = array();
 
     $panels[] = $this->newPanel()
       ->setBuiltinKey(PhabricatorProject::PANEL_PROFILE)
       ->setPanelKey(PhabricatorProjectDetailsProfilePanel::PANELKEY);
 
     $panels[] = $this->newPanel()
       ->setBuiltinKey(PhabricatorProject::PANEL_POINTS)
       ->setPanelKey(PhabricatorProjectPointsProfilePanel::PANELKEY);
 
     $panels[] = $this->newPanel()
       ->setBuiltinKey(PhabricatorProject::PANEL_WORKBOARD)
       ->setPanelKey(PhabricatorProjectWorkboardProfilePanel::PANELKEY);
 
     $panels[] = $this->newPanel()
       ->setBuiltinKey(PhabricatorProject::PANEL_MEMBERS)
       ->setPanelKey(PhabricatorProjectMembersProfilePanel::PANELKEY);
 
     $panels[] = $this->newPanel()
       ->setBuiltinKey(PhabricatorProject::PANEL_SUBPROJECTS)
       ->setPanelKey(PhabricatorProjectSubprojectsProfilePanel::PANELKEY);
 
+    if (class_exists('PhabricatorMilestoneNavProfilePanel')) {
+      $panels[] = $this->newPanel()
+        ->setBuiltinKey(PhabricatorMilestoneNavProfilePanel::PANELKEY)
+        ->setPanelKey(PhabricatorMilestoneNavProfilePanel::PANELKEY);
+    }
+
     $panels[] = $this->newPanel()
       ->setBuiltinKey(PhabricatorProject::PANEL_MANAGE)
       ->setPanelKey(PhabricatorProjectManageProfilePanel::PANELKEY);
 
     return $panels;
   }
 
 }