diff --git a/src/view/phui/PHUISegmentBarView.php b/src/view/phui/PHUISegmentBarView.php
--- a/src/view/phui/PHUISegmentBarView.php
+++ b/src/view/phui/PHUISegmentBarView.php
@@ -30,7 +30,7 @@
     require_celerity_resource('phui-segment-bar-view-css');
 
     $label = $this->label;
-    if (strlen($label)) {
+    if ($label !== null) {
       $label = phutil_tag(
         'div',
         array(