diff --git a/Sming/Components/rboot/README.rst b/Sming/Components/rboot/README.rst
index 95ddeb0203..7ce6c629ef 100644
--- a/Sming/Components/rboot/README.rst
+++ b/Sming/Components/rboot/README.rst
@@ -104,7 +104,7 @@ To enable slot 2, set these values:
                "address": "0x100000",
                "size": "512K",
                "type": "app",
-               "subtype": "ota_1"
+               "subtype": "ota_2"
             }
          }
       }