diff --git a/message_definitions/v1.0/common.xml b/message_definitions/v1.0/common.xml
index c26a6e676f3..5e7c7cda09f 100644
--- a/message_definitions/v1.0/common.xml
+++ b/message_definitions/v1.0/common.xml
@@ -955,6 +955,9 @@
       <entry value="4" name="REBOOT_SHUTDOWN_ACTION_POWER_ON">
         <description>Power on component. Do nothing if component is already powered (ACK command with MAV_RESULT_ACCEPTED).</description>
       </entry>
+      <entry value="5" name="REBOOT_SHUTDOWN_ACTION_REBOOT_TO_MASS_STORAGE">
+        <description>Reboot component into a mass storage mode if supported.</description>
+      </entry>
     </enum>
     <enum name="REBOOT_SHUTDOWN_CONDITIONS">
       <description>Specifies the conditions under which the MAV_CMD_PREFLIGHT_REBOOT_SHUTDOWN command should be accepted.</description>