diff --git a/Tools/autotest/arducopter.py b/Tools/autotest/arducopter.py
index adbd6983767..2a6c0d6be8d 100644
--- a/Tools/autotest/arducopter.py
+++ b/Tools/autotest/arducopter.py
@@ -15949,7 +15949,7 @@ class AutoTestCopter(vehicle_test_suite.TestSuite):
 
     def BrakeZ(self):
         '''check jerk limit correct in Brake mode'''
-        self.set_parameter('PSC_JERK_D', 3)
+        self.set_parameter('PSC_D_JERK', 3)
         self.takeoff(50, mode='GUIDED')
         vx, vy, vz_up = (0, 0, -1)
         self.test_guided_local_velocity_target(vx=vx, vy=vy, vz_up=vz_up, timeout=10)