diff --git a/msg/vehicle_global_position.msg b/msg/vehicle_global_position.msg
index 6a38e2c9d7..cee381e871 100644
--- a/msg/vehicle_global_position.msg
+++ b/msg/vehicle_global_position.msg
@@ -18,3 +18,4 @@ float32 epv			# Standard deviation of position vertically
 float32 terrain_alt		# Terrain altitude in m, WGS84
 bool terrain_alt_valid		# Terrain altitude estimate is valid
 bool dead_reckoning		# True if this position is estimated through dead-reckoning
+float32 pressure_alt		# Pressure altitude
diff --git a/src/modules/mavlink/mavlink_messages.cpp b/src/modules/mavlink/mavlink_messages.cpp
index a4926aaed6..b6653a83e0 100644
--- a/src/modules/mavlink/mavlink_messages.cpp
+++ b/src/modules/mavlink/mavlink_messages.cpp
@@ -2602,7 +2602,7 @@ protected:
 		if (updated) {
 			mavlink_altitude_t msg;
 
-			msg.altitude_monotonic = global_pos.alt;
+			msg.altitude_monotonic = global_pos.pressure_alt;
 			msg.altitude_amsl = global_pos.alt;
 			msg.altitude_local = -local_pos.z;
 			msg.altitude_relative = home.alt;