diff --git a/src/modules/mavlink/mavlink_mission.cpp b/src/modules/mavlink/mavlink_mission.cpp
index 9bb956281e..b2288469c9 100644
--- a/src/modules/mavlink/mavlink_mission.cpp
+++ b/src/modules/mavlink/mavlink_mission.cpp
@@ -128,14 +128,8 @@ MavlinkMissionManager::update_active_mission(int dataman_id, unsigned count, int
 	mission.current_seq = seq;
 
 	/* update mission state in dataman */
-	/* lock MISSION_STATE item */
-	dm_lock(DM_KEY_MISSION_STATE);
-
 	int res = dm_write(DM_KEY_MISSION_STATE, 0, DM_PERSIST_POWER_ON_RESET, &mission, sizeof(mission_s));
 
-	/* unlock MISSION_STATE item */
-	dm_unlock(DM_KEY_MISSION_STATE);
-
 	if (res == sizeof(mission_s)) {
 		/* update active mission state */
 		_dataman_id = dataman_id;