diff --git a/libraries/AC_AttitudeControl/AC_PosControl.cpp b/libraries/AC_AttitudeControl/AC_PosControl.cpp
index afad2ab3ff..3e3ce4c4f1 100644
--- a/libraries/AC_AttitudeControl/AC_PosControl.cpp
+++ b/libraries/AC_AttitudeControl/AC_PosControl.cpp
@@ -995,7 +995,7 @@ void AC_PosControl::update_z_controller()
 
     // ensure imax is always large enough to overpower hover throttle
     if (_motors.get_throttle_hover() * 1000.0f > _pid_accel_z.imax()) {
-        _pid_accel_z.imax(_motors.get_throttle_hover() * 1000.0f);
+        _pid_accel_z.set_imax(_motors.get_throttle_hover() * 1000.0f);
     }
     float thr_out;
     if (_vibe_comp_enabled) {