diff --git a/Tools/autotest/ArduPlane.parm b/Tools/autotest/ArduPlane.parm
index 8d810994d9..e2fe234e5e 100644
--- a/Tools/autotest/ArduPlane.parm
+++ b/Tools/autotest/ArduPlane.parm
@@ -74,4 +74,4 @@ PTCH2SRV_I       0.2
 PTCH2SRV_P       2
 PTCH2SRV_RLL     1.25
 NAVL1_PERIOD     21
-ACRO_LOCKED      1
+ACRO_LOCKING     1