diff --git a/micropython/examples/inventor2040w/motors/reactive_encoder.py b/micropython/examples/inventor2040w/motors/reactive_encoder.py
index d36a0928..543e9ed8 100644
--- a/micropython/examples/inventor2040w/motors/reactive_encoder.py
+++ b/micropython/examples/inventor2040w/motors/reactive_encoder.py
@@ -36,7 +36,7 @@ POS_KD = 0.0022                         # Position derivative (D) gain
 
 
 # Create a new Inventor2040W and get a motor and encoder from it
-board = Inventor2040W(motor_rear_ratio=GEAR_RATIO)
+board = Inventor2040W(motor_gear_ratio=GEAR_RATIO)
 m = board.motors[MOTOR_A]
 enc = board.encoders[MOTOR_A]