diff --git a/src/infrastructure/contentsource/PhabricatorContentSource.php b/src/infrastructure/contentsource/PhabricatorContentSource.php
--- a/src/infrastructure/contentsource/PhabricatorContentSource.php
+++ b/src/infrastructure/contentsource/PhabricatorContentSource.php
@@ -81,6 +81,13 @@
       ));
   }
 
+  /**
+   * Get the internal source name
+   *
+   * This is usually coming from a SOURCECONST constant.
+   *
+   * @return string|null
+   */
   final public function getSource() {
     return $this->source;
   }
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');