diff --git a/libraries/AP_HAL_ESP32/README.md b/libraries/AP_HAL_ESP32/README.md
index 43983747a4..6ca30d3650 100644
--- a/libraries/AP_HAL_ESP32/README.md
+++ b/libraries/AP_HAL_ESP32/README.md
@@ -182,9 +182,9 @@ After flashing the esp32 , u can connect with a terminal app of your preference
 ### Compass (using i2c)
  - u need to set the ardupilot params, and connected a GPS that has at least one i2c compass on it.. tested this with a HMC5883 and/or LIS3MDL
 COMPASS_ENABLE=1
-COMPASS1_EXTERN=1
-COMPASS2_EXTERN=1
-COMPASS3_EXTERN=1
+COMPASS_EXTERNAL=1
+COMPASS_EXTERN2=1
+COMPASS_EXTERN3=1
 
 ### Analog input/s