diff --git a/Tools/autotest/arduplane.py b/Tools/autotest/arduplane.py
index 9ebc80c174..28622f97db 100644
--- a/Tools/autotest/arduplane.py
+++ b/Tools/autotest/arduplane.py
@@ -695,7 +695,7 @@ class AutoTestPlane(AutoTest):
             flaps_ch = 5
             servo_ch = 5
             self.set_parameter("SERVO%u_FUNCTION" % servo_ch, 3) # flapsauto
-            self.set_parameter("FLAP_IN_CHANNEL", flaps_ch)
+            self.set_parameter("RC%u_OPTION" % flaps_ch, 208) # Flaps RCx_OPTION
             self.set_parameter("LAND_FLAP_PERCNT", 50)
             self.set_parameter("LOG_DISARMED", 1)
             flaps_ch_min = 1000