diff --git a/files/nb_onedevice_update.py b/files/nb_onedevice_update.py
index 61671cd..0f624b2 100644
--- a/files/nb_onedevice_update.py
+++ b/files/nb_onedevice_update.py
@@ -19,7 +19,7 @@ Behavior
   If Cloud ipAddress is placeholder/invalid:
     skip IP changes and do not prune.
 - --chatty logs step-by-step to stderr; stdout remains one-line OK/FAIL.
-- NEW: Logs custom field cf_upgrade_cmd as `NB: upgrade_cmd=<value>` when --chatty.
+- NEW: Logs custom field upgrade_cmd as `NB: upgrade_cmd=<value>` when --chatty.
 
 Exit codes:
   0 = success
@@ -253,7 +253,7 @@ def run(hostname: str) -> None:
     cf = dev_full.get("custom_fields") or {}
 
     # NEW: log upgrade command if present
-    upgrade_cmd = cf.get("cf_upgrade_cmd")
+    upgrade_cmd = cf.get("upgrade_cmd")
     log(f"NB: upgrade_cmd={upgrade_cmd}")
 
     cloud_id = cf.get("cloud_id")