diff --git a/src/applications/files/management/PhabricatorFilesManagementWorkflow.php b/src/applications/files/management/PhabricatorFilesManagementWorkflow.php
index 760e922b58..4272122802 100644
--- a/src/applications/files/management/PhabricatorFilesManagementWorkflow.php
+++ b/src/applications/files/management/PhabricatorFilesManagementWorkflow.php
@@ -33,7 +33,7 @@ abstract class PhabricatorFilesManagementWorkflow
           }
         } else {
           $file = id(new PhabricatorFile())->loadOneWhere(
-            'phid = %d',
+            'phid = %s',
             $name);
           if (!$file) {
             throw new PhutilArgumentUsageException(