diff --git a/3.5.-pri-request=bikes_available.md b/3.5.-pri-request=bikes_available.md
index 7fde1db..2abccf8 100644
--- a/3.5.-pri-request=bikes_available.md
+++ b/3.5.-pri-request=bikes_available.md
@@ -47,7 +47,7 @@
 **smartlock_type** JSON Object 
 | key          | Required | Format           | Comment                        |
 | ------------------ | -------- | ---------------- | -------------------------- |
-| system       | o          | text                 | ex. "Ilockit"  |
+| engine  | o | object |  contains engine attributes like "manufacturer" |
 | battery | o | object | contains smartlock battery attributes. |
 
 
@@ -121,7 +121,9 @@ https://sharee-primary.example.tld/APIjsonserver?request=bikes_available&authcoo
             "uri_operator" : "https://shareeapp-op.example.tld",
             "system" : "Ilockit",
             "smartlock_type" : {
-               "system" : "Ilockit",
+               "engine" : {
+                  "manufacturer" : "Ilockit"
+               },
                "battery" : {
                   "charge_current_percent" : "37"
                }