diff --git a/src/applications/repository/query/PhabricatorRepositoryRefCursorQuery.php b/src/applications/repository/query/PhabricatorRepositoryRefCursorQuery.php
--- a/src/applications/repository/query/PhabricatorRepositoryRefCursorQuery.php
+++ b/src/applications/repository/query/PhabricatorRepositoryRefCursorQuery.php
@@ -132,7 +132,7 @@
         $name_hashes);
     }
 
-    if (strlen($this->datasourceQuery)) {
+    if (phutil_nonempty_string($this->datasourceQuery)) {
       $where[] = qsprintf(
         $conn,
         'refNameRaw LIKE %>',