diff --git a/docs/en/migration-guides/peripherals.rst b/docs/en/migration-guides/peripherals.rst
index 58cb0a342b..24c6e44caa 100644
--- a/docs/en/migration-guides/peripherals.rst
+++ b/docs/en/migration-guides/peripherals.rst
@@ -20,7 +20,8 @@ To make the API clearer, we renamed the function ``esp_rom_spiflash_lock`` to ``
 ADC
 ---
 
-Previous `driver/adc2_wifi_private.h` has been moved to `esp_private/adc2_wifi.h`.
+- Previous `driver/adc2_wifi_private.h` has been moved to `esp_private/adc2_wifi.h`.
+- Enums `ADC_UNIT_BOTH`, `ADC_UNIT_ALTER` and `ADC_UNIT_MAX` in ``adc_unit_t`` are removed.
 
 GPIO
 ----