diff --git a/message_definitions/v1.0/common.xml b/message_definitions/v1.0/common.xml
index c77b409ceb..bbecbdf648 100644
--- a/message_definitions/v1.0/common.xml
+++ b/message_definitions/v1.0/common.xml
@@ -6117,7 +6117,7 @@
       <description>Camera absolute thermal range. This can be streamed when the associated `VIDEO_STREAM_STATUS.flag` bit `VIDEO_STREAM_STATUS_FLAGS_THERMAL_RANGE_ENABLED` is set, but a GCS may choose to only request it for the current active stream. Use MAV_CMD_SET_MESSAGE_INTERVAL to define message interval (param3 indicates the stream id of the current camera, or 0 for all streams, param4 indicates the target camera_device_id for autopilot-attached cameras or 0 for MAVLink cameras).</description>
       <field type="uint32_t" name="time_boot_ms" units="ms">Timestamp (time since system boot).</field>
       <field type="uint8_t" name="stream_id" minValue="1" instance="true">Video Stream ID (1 for first, 2 for second, etc.)</field>
-      <field type="uint8_t" name="camera_device_id" invalid="0">Camera id of a camera associated with this component. This is the component id of a proxied MAVLink camera, or 1-6 for a non-MAVLink camera attached to the component. Use 0 if the component is a camera (not something else providing access to a camera).</field>
+      <field type="uint8_t" name="camera_device_id" default="0" minValue="0" maxValue="6">Camera id of a non-MAVLink camera attached to an autopilot (1-6).  0 if the component is a MAVLink camera (with its own component id).</field>
       <field type="float" name="max" units="degC">Temperature max.</field>
       <field type="float" name="max_point_x" invalid="NaN">Temperature max point x value (normalized 0..1, 0 is left, 1 is right), NAN if unknown.</field>
       <field type="float" name="max_point_y" invalid="NaN">Temperature max point y value (normalized 0..1, 0 is top, 1 is bottom), NAN if unknown.</field>