diff --git a/src/infrastructure/contentsource/PhabricatorUnknownContentSource.php b/src/infrastructure/contentsource/PhabricatorUnknownContentSource.php
--- a/src/infrastructure/contentsource/PhabricatorUnknownContentSource.php
+++ b/src/infrastructure/contentsource/PhabricatorUnknownContentSource.php
@@ -7,7 +7,7 @@
 
   public function getSourceName() {
     $source = $this->getSource();
-    if (strlen($source)) {
+    if ($source) {
       return pht('Unknown ("%s")', $source);
     } else {
       return pht('Unknown');