diff --git a/src/applications/dashboard/controller/panel/PhabricatorDashboardPanelEditController.php b/src/applications/dashboard/controller/panel/PhabricatorDashboardPanelEditController.php
--- a/src/applications/dashboard/controller/panel/PhabricatorDashboardPanelEditController.php
+++ b/src/applications/dashboard/controller/panel/PhabricatorDashboardPanelEditController.php
@@ -15,7 +15,7 @@
     // editing.
 
     $context_phid = $request->getStr('contextPHID');
-    if (strlen($context_phid)) {
+    if (phutil_nonempty_string($context_phid)) {
       $context = id(new PhabricatorObjectQuery())
         ->setViewer($viewer)
         ->withPHIDs(array($context_phid))