diff --git a/src/modules/commander/airspeed_calibration.cpp b/src/modules/commander/airspeed_calibration.cpp
index 421e53ae02..a1b8816ff0 100644
--- a/src/modules/commander/airspeed_calibration.cpp
+++ b/src/modules/commander/airspeed_calibration.cpp
@@ -200,13 +200,13 @@ int do_airspeed_calibration(int mavlink_fd)
 			float curr_avg = (diff_pres_offset / calibration_counter);
 
 			if (calc_indicated_airspeed(fabsf(curr_avg)) < 10.0f) {
-				mavlink_log_critical(mavlink_fd, "Put a finger on front hole of pitot");
+				mavlink_log_critical(mavlink_fd, "Put a finger on front hole of pitot (%.1f m/s)", curr_avg);
 				usleep(5000 * 1000);
 				continue;
 			}
 
 			/* do not log negative values in the second go */
-			if (curr_avg < calc_indicated_airspeed(-5.0f)) {
+			if (curr_avg < -calc_indicated_airspeed(5.0f)) {
 				mavlink_log_critical(mavlink_fd, "Negative val: swap static<->dynamic ports,restart");
 				close(diff_pres_sub);