diff --git a/src/view/phui/PHUIListItemView.php b/src/view/phui/PHUIListItemView.php
--- a/src/view/phui/PHUIListItemView.php
+++ b/src/view/phui/PHUIListItemView.php
@@ -249,7 +249,7 @@
         $name = phutil_tag(
           'span',
           array(
-            'class' => $classes,
+            'class' => implode(' ', $classes),
           ),
           array(
             $this->name,