diff --git a/libraries/GCS_MAVLink/message_definitions/ardupilotmega.xml b/libraries/GCS_MAVLink/message_definitions/ardupilotmega.xml
index 072e1d61fa..e16a5ff141 100644
--- a/libraries/GCS_MAVLink/message_definitions/ardupilotmega.xml
+++ b/libraries/GCS_MAVLink/message_definitions/ardupilotmega.xml
@@ -23,6 +23,16 @@
Empty
Empty
+
+ Mission command to operate EPM gripper
+ gripper number (a number from 1 to max number of grippers on the vehicle)
+ gripper action (0=release, 1=grab. See GRIPPER_ACTIONS enum)
+ Empty
+ Empty
+ Empty
+ Empty
+ Empty
+
@@ -75,6 +85,17 @@
+
+
+ Gripper actions.
+
+ gripper release of cargo
+
+
+ gripper grabs onto cargo
+
+
+
Camera heartbeat, announce camera component ID at 1hz