diff --git a/components/sensor/adc.rst b/components/sensor/adc.rst
index d5fe6c2ef..a95c690e1 100644
--- a/components/sensor/adc.rst
+++ b/components/sensor/adc.rst
@@ -63,7 +63,7 @@ ESP32 Attenuation
 -----------------
 
 On the ESP32 the voltage measured with the ADC caps out at ~1.1V by default as the sensing range (attenuation of the ADC) is set to ``0db`` by default.
-Measuring higher voltages requires setting ``attenuation`` to one of the following values: ``0db``, ``2.5db``, ``6db``, ``12db``.
+Measuring higher voltages requires setting ``attenuation`` to one of the following values: ``0db``, ``2.5db``, ``6db``, ``11db``.
 There's more information `at the manufacturer's website <https://docs.espressif.com/projects/esp-idf/en/v4.4.7/esp32/api-reference/peripherals/adc.html#_CPPv425adc1_config_channel_atten14adc1_channel_t11adc_atten_t>`__.
 
 To simplify this, we provide the setting ``attenuation: auto`` for an automatic/seamless transition among scales. `Our implementation