diff --git a/message_definitions/v1.0/common.xml b/message_definitions/v1.0/common.xml
index 67d19a46735..9bb59ba9f7f 100644
--- a/message_definitions/v1.0/common.xml
+++ b/message_definitions/v1.0/common.xml
@@ -1053,7 +1053,12 @@
         <param index="7">Empty</param>
       </entry>
       <entry value="179" name="MAV_CMD_DO_SET_HOME" hasLocation="true" isDestination="false">
-        <description>Changes the home location either to the current location or a specified location.</description>
+        <description>
+          Sets the home position to either to the current position or a specified position.
+          The home position is the default position that the system will return to and land on.
+          The position is set automatically by the system during the takeoff (and may also be set using this command).
+          Note: the current home position may be emitted in a HOME_POSITION message on request (using MAV_CMD_REQUEST_MESSAGE with param1=242).
+        </description>
         <param index="1" label="Use Current" enum="MAV_BOOL">Use current location (MAV_BOOL_FALSE: use specified location). Values not equal to 0 or 1 are invalid.</param>
         <param index="2">Empty</param>
         <param index="3">Empty</param>