diff --git a/src/applications/policy/controller/PhabricatorPolicyExplainController.php b/src/applications/policy/controller/PhabricatorPolicyExplainController.php
index 09fd69242a..4224319d9c 100644
--- a/src/applications/policy/controller/PhabricatorPolicyExplainController.php
+++ b/src/applications/policy/controller/PhabricatorPolicyExplainController.php
@@ -1,92 +1,112 @@
 <?php
 
 final class PhabricatorPolicyExplainController
   extends PhabricatorPolicyController {
 
   private $phid;
   private $capability;
 
   public function shouldAllowPublic() {
     return true;
   }
 
   public function willProcessRequest(array $data) {
     $this->phid = $data['phid'];
     $this->capability = $data['capability'];
   }
 
   public function processRequest() {
     $request = $this->getRequest();
     $viewer = $request->getUser();
 
     $phid = $this->phid;
     $capability = $this->capability;
 
     $object = id(new PhabricatorObjectQuery())
       ->setViewer($viewer)
       ->withPHIDs(array($phid))
       ->executeOne();
     if (!$object) {
       return new Aphront404Response();
     }
 
     $policies = PhabricatorPolicyQuery::loadPolicies(
       $viewer,
       $object);
 
     $policy = idx($policies, $capability);
     if (!$policy) {
       return new Aphront404Response();
     }
 
     $handle = id(new PhabricatorHandleQuery())
       ->setViewer($viewer)
       ->withPHIDs(array($phid))
       ->executeOne();
     $object_uri = nonempty($handle->getURI(), '/');
 
     $explanation = PhabricatorPolicy::getPolicyExplanation(
       $viewer,
       $policy->getPHID());
 
     $auto_info = (array)$object->describeAutomaticCapability($capability);
 
     $auto_info = array_merge(
       array($explanation),
       $auto_info);
     $auto_info = array_filter($auto_info);
 
     foreach ($auto_info as $key => $info) {
       $auto_info[$key] = phutil_tag('li', array(), $info);
     }
     if ($auto_info) {
       $auto_info = phutil_tag('ul', array(), $auto_info);
     }
 
     $capability_name = $capability;
     $capobj = PhabricatorPolicyCapability::getCapabilityByKey($capability);
     if ($capobj) {
       $capability_name = $capobj->getCapabilityName();
     }
 
+    $space_info = null;
+    if ($object instanceof PhabricatorSpacesInterface) {
+      if (PhabricatorSpacesNamespaceQuery::getViewerSpacesExist($viewer)) {
+        $space_phid = PhabricatorSpacesNamespaceQuery::getObjectSpacePHID(
+          $object);
+
+        $handles = $viewer->loadHandles(array($space_phid));
+
+        $space_info = array(
+          pht(
+            'This object is in %s, and can only be seen by users with '.
+            'access to that space.',
+            $handles[$space_phid]->renderLink()),
+          phutil_tag('br'),
+          phutil_tag('br'),
+        );
+      }
+    }
+
     $content = array(
+      $space_info,
       pht('Users with the "%s" capability:', $capability_name),
       $auto_info,
     );
 
     $object_name = pht(
       '%s %s',
       $handle->getTypeName(),
       $handle->getObjectName());
 
     $dialog = id(new AphrontDialogView())
       ->setUser($viewer)
       ->setClass('aphront-access-dialog')
       ->setTitle(pht('Policy Details: %s', $object_name))
       ->appendChild($content)
       ->addCancelButton($object_uri, pht('Done'));
 
     return id(new AphrontDialogResponse())->setDialog($dialog);
   }
 
 }