diff --git a/src/applications/base/controller/PhabricatorController.php b/src/applications/base/controller/PhabricatorController.php
index 446576d89e..39ca6fdfde 100644
--- a/src/applications/base/controller/PhabricatorController.php
+++ b/src/applications/base/controller/PhabricatorController.php
@@ -235,12 +235,31 @@ abstract class PhabricatorController extends AphrontController {
       ->loadHandles();
   }
 
-  protected function renderHandlesForPHIDs(array $phids) {
+
+  /**
+   * Render a list of links to handles, identified by PHIDs. The handles must
+   * already be loaded.
+   *
+   * @param   list<phid>  List of PHIDs to render links to.
+   * @param   string      Style, one of "\n" (to put each item on its own line)
+   *                      or "," (to list items inline, separated by commas).
+   * @return  string      Rendered list of handle links.
+   */
+  protected function renderHandlesForPHIDs(array $phids, $style = "\n") {
+    $style_map = array(
+      "\n"  => '<br />',
+      ','   => ', ',
+    );
+
+    if (empty($style_map[$style])) {
+      throw new Exception("Unknown handle list style '{$style}'!");
+    }
+
     $items = array();
     foreach ($phids as $phid) {
       $items[] = $this->getHandle($phid)->renderLink();
     }
-    return implode('<br />', $items);
+    return implode($style_map[$style], $items);
   }
 
   protected function buildApplicationMenu() {
diff --git a/src/applications/maniphest/controller/ManiphestTaskDetailController.php b/src/applications/maniphest/controller/ManiphestTaskDetailController.php
index 1878c343ee..28a769c7ea 100644
--- a/src/applications/maniphest/controller/ManiphestTaskDetailController.php
+++ b/src/applications/maniphest/controller/ManiphestTaskDetailController.php
@@ -445,7 +445,7 @@ final class ManiphestTaskDetailController extends ManiphestController {
     $view->addProperty(
       pht('Subscribers'),
       $task->getCCPHIDs()
-        ? $this->renderHandlesForPHIDs($task->getCCPHIDs())
+        ? $this->renderHandlesForPHIDs($task->getCCPHIDs(), ',')
         : '<em>'.pht('None').'</em>');
 
     $view->addProperty(
@@ -468,7 +468,7 @@ final class ManiphestTaskDetailController extends ManiphestController {
     $view->addProperty(
       pht('Projects'),
       $task->getProjectPHIDs()
-        ? $this->renderHandlesForPHIDs($task->getProjectPHIDs())
+        ? $this->renderHandlesForPHIDs($task->getProjectPHIDs(), ',')
         : '<em>'.pht('None').'</em>');
 
     foreach ($aux_fields as $aux_field) {