diff --git a/src/applications/differential/storage/DifferentialTransaction.php b/src/applications/differential/storage/DifferentialTransaction.php
index 9ca7307170..7342f35498 100644
--- a/src/applications/differential/storage/DifferentialTransaction.php
+++ b/src/applications/differential/storage/DifferentialTransaction.php
@@ -227,7 +227,7 @@ final class DifferentialTransaction
         $tags[] = self::MAILTAG_REVIEWERS;
         break;
       case DifferentialRevisionCloseTransaction::TRANSACTIONTYPE:
-        $tags[] = self::MAILTAG_CLSOED;
+        $tags[] = self::MAILTAG_CLOSED;
         break;
     }