diff --git a/src/applications/repository/worker/commitmessageparser/PhabricatorRepositoryCommitMessageParserWorker.php b/src/applications/repository/worker/commitmessageparser/PhabricatorRepositoryCommitMessageParserWorker.php
--- a/src/applications/repository/worker/commitmessageparser/PhabricatorRepositoryCommitMessageParserWorker.php
+++ b/src/applications/repository/worker/commitmessageparser/PhabricatorRepositoryCommitMessageParserWorker.php
@@ -36,7 +36,7 @@
 
     $author = $ref->getAuthor();
     $committer = $ref->getCommitter();
-    $has_committer = (bool)strlen($committer);
+    $has_committer = phutil_nonempty_string($committer);
 
     $identity_engine = id(new DiffusionRepositoryIdentityEngine())
       ->setViewer($viewer)