diff --git a/src/modules/vtol_att_control/vtol_att_control_main.cpp b/src/modules/vtol_att_control/vtol_att_control_main.cpp
index 8c540c7f49..d19370eb3c 100644
--- a/src/modules/vtol_att_control/vtol_att_control_main.cpp
+++ b/src/modules/vtol_att_control/vtol_att_control_main.cpp
@@ -510,6 +510,9 @@ VtolAttitudeControl::parameters_update()
 	param_get(_params_handles.front_trans_timeout, &_params.front_trans_timeout);
 	param_get(_params_handles.mpc_xy_cruise, &_params.mpc_xy_cruise);
 
+	// make sure parameters are feasible, require at least 1 m/s difference between transition and blend airspeed
+	_params.airspeed_blend = math::min(_params.airspeed_blend, _params.transition_airspeed - 1.0f);
+
 	// update the parameters of the instances of base VtolType
 	if (_vtol_type != nullptr) {
 		_vtol_type->parameters_update();