diff --git a/libraries/AP_Airspeed/AP_Airspeed.cpp b/libraries/AP_Airspeed/AP_Airspeed.cpp
index 8191cc41ee..a5d94d31aa 100644
--- a/libraries/AP_Airspeed/AP_Airspeed.cpp
+++ b/libraries/AP_Airspeed/AP_Airspeed.cpp
@@ -562,7 +562,7 @@ void AP_Airspeed::update_calibration(uint8_t i, float raw_pressure)
             // check if new offset differs too greatly from last calibration, indicating pitot uncovered in wind
             if (fixed_wing_parameters != nullptr) {
                 float airspeed_min = fixed_wing_parameters->airspeed_min.get();
-                // use percentage of ARSPD_FBW_MIN as criteria for max allowed change in offset
+                // use percentage of AIRSPEED_MIN as criteria for max allowed change in offset
                 float max_change = 0.5*(sq((1 + (max_speed_pcnt * 0.01))*airspeed_min) - sq(airspeed_min));
                 if (max_speed_pcnt > 0 && (abs(calibrated_offset-param[i].offset) > max_change) && (abs(param[i].offset) > 0)) {
                     GCS_SEND_TEXT(MAV_SEVERITY_WARNING, "Arspd %d offset change large;cover and recal", i +1);