diff --git a/qmp-commands.hx b/qmp-commands.hx
index f58a841..f90efe5 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -1659,7 +1659,7 @@ Each json-object contain the following:
          - Possible values: "unknown"
 - "removable": true if the device is removable, false otherwise (json-bool)
 - "locked": true if the device is locked, false otherwise (json-bool)
-- "tray-open": only present if removable, true if the device has a tray,
+- "tray_open": only present if removable, true if the device has a tray,
                and it is open (json-bool)
 - "inserted": only present if the device is inserted, it is a json-object
    containing the following: