diff --git a/src/modules/vtol_att_control/tiltrotor.cpp b/src/modules/vtol_att_control/tiltrotor.cpp
index 1cc1e19088b..d0832138e43 100644
--- a/src/modules/vtol_att_control/tiltrotor.cpp
+++ b/src/modules/vtol_att_control/tiltrotor.cpp
@@ -251,17 +251,23 @@ void Tiltrotor::update_transition_state()
 		_mc_roll_weight = 1.0f;
 		_mc_yaw_weight = 1.0f;
 
-		if (PX4_ISFINITE(_attc->get_calibrated_airspeed()) &&
+		const float airspeed_trans_blend_margin = getTransitionAirspeed() - getBlendAirspeed();
+
+		if (airspeed_trans_blend_margin > FLT_EPSILON &&
+		    PX4_ISFINITE(_attc->get_calibrated_airspeed()) &&
 		    _attc->get_calibrated_airspeed() >= getBlendAirspeed()) {
 			_mc_roll_weight = 1.0f - (_attc->get_calibrated_airspeed() - getBlendAirspeed()) /
-					  (getTransitionAirspeed()  - getBlendAirspeed());
+					  airspeed_trans_blend_margin;
 		}
 
 		// without airspeed do timed weight changes
+		const float time_trans_open_loop_margin = getOpenLoopFrontTransitionTime() - getMinimumFrontTransitionTime();
+
 		if ((!PX4_ISFINITE(_attc->get_calibrated_airspeed())) &&
+		    time_trans_open_loop_margin > FLT_EPSILON &&
 		    _time_since_trans_start > getMinimumFrontTransitionTime()) {
 			_mc_roll_weight = 1.0f - (_time_since_trans_start - getMinimumFrontTransitionTime()) /
-					  (getOpenLoopFrontTransitionTime() - getMinimumFrontTransitionTime());
+					  time_trans_open_loop_margin;
 		}
 
 		// add minimum throttle for front transition