diff --git a/ESP-IDF_Robot/tutorial/docs/source/transmitter.rst b/ESP-IDF_Robot/tutorial/docs/source/transmitter.rst
index 2917e9616..1977fda8e 100644
--- a/ESP-IDF_Robot/tutorial/docs/source/transmitter.rst
+++ b/ESP-IDF_Robot/tutorial/docs/source/transmitter.rst
@@ -11,7 +11,7 @@ Configuration Variables
     typedef struct {
         int         x_axis;             // Joystick x-position
         int         y_axis;             // Joystick y-position
-        bool        nav_btn;           // Joystick push button
+        bool        nav_btn;            // Joystick push button
         bool        led;                // LED ON/OFF state
         uint8_t     motor1_rpm_pwm;     // PWMs for 4 DC motors
         uint8_t     motor2_rpm_pwm;