diff --git a/src/UpgradeCRM.php b/src/UpgradeCRM.php
index 4001be0f64..64182b2f88 100644
--- a/src/UpgradeCRM.php
+++ b/src/UpgradeCRM.php
@@ -152,7 +152,7 @@
       method : 'POST',
       path : 'database/backup',
       data : JSON.stringify({
-        'iArchiveType' : 3
+        'BackupType' : 3
       })
     })
     .done(function(data) {