diff --git a/src/applications/differential/xaction/DifferentialRevisionInlineTransaction.php b/src/applications/differential/xaction/DifferentialRevisionInlineTransaction.php
index 9e566047ec..35d5034033 100644
--- a/src/applications/differential/xaction/DifferentialRevisionInlineTransaction.php
+++ b/src/applications/differential/xaction/DifferentialRevisionInlineTransaction.php
@@ -40,7 +40,7 @@ final class DifferentialRevisionInlineTransaction
 
     return array(
       'diff' => array(
-        'id' => $diff->getID(),
+        'id' => (int)$diff->getID(),
         'phid' => $diff->getPHID(),
       ),
       'path' => $changeset->getDisplayFilename(),