diff --git a/msg/airspeed.msg b/msg/airspeed.msg
index 8d6af2138d..525bfd7f88 100644
--- a/msg/airspeed.msg
+++ b/msg/airspeed.msg
@@ -1,4 +1,5 @@
 uint64 timestamp			# microseconds since system boot, needed to integrate
 float32 indicated_airspeed_m_s		# indicated airspeed in meters per second, -1 if unknown
-float32 true_airspeed_m_s		# true airspeed in meters per second, -1 if unknown
+float32 true_airspeed_m_s		# true filtered airspeed in meters per second, -1 if unknown
+float32 true_airspeed_unfiltered_m_s	# true airspeed in meters per second, -1 if unknown
 float32 air_temperature_celsius		# air temperature in degrees celsius, -1000 if unknown