diff --git a/msg/actuator_controls.msg b/msg/actuator_controls.msg
index 2f253d7a18..010e72790d 100644
--- a/msg/actuator_controls.msg
+++ b/msg/actuator_controls.msg
@@ -1,5 +1,5 @@
 uint64 timestamp			# time since system start (microseconds)
-uint8 NUM_ACTUATOR_CONTROLS = 8
+uint8 NUM_ACTUATOR_CONTROLS = 9
 uint8 NUM_ACTUATOR_CONTROL_GROUPS = 4
 uint8 INDEX_ROLL = 0
 uint8 INDEX_PITCH = 1