diff --git a/os/hal/platforms/STM32F2xx/adc_lld.h b/os/hal/platforms/STM32F2xx/adc_lld.h
index 08e15d778..be2de51d2 100644
--- a/os/hal/platforms/STM32F2xx/adc_lld.h
+++ b/os/hal/platforms/STM32F2xx/adc_lld.h
@@ -47,12 +47,12 @@
  * @{
  */
 /**
- * @brief   Maximum HSE  clock frequency.
+ * @brief   Minimum ADC clock frequency.
  */
 #define STM32_ADCCLK_MIN        600000
 
 /**
- * @brief   Maximum HSE  clock frequency.
+ * @brief   Maximum ADC clock frequency.
  */
 #define STM32_ADCCLK_MAX        30000000
 /** @} */
diff --git a/os/hal/platforms/STM32F4xx/adc_lld.h b/os/hal/platforms/STM32F4xx/adc_lld.h
index 559dd1c54..00aca8005 100644
--- a/os/hal/platforms/STM32F4xx/adc_lld.h
+++ b/os/hal/platforms/STM32F4xx/adc_lld.h
@@ -47,12 +47,12 @@
  * @{
  */
 /**
- * @brief   Maximum HSE  clock frequency.
+ * @brief   Minimum ADC clock frequency.
  */
 #define STM32_ADCCLK_MIN        600000
 
 /**
- * @brief   Maximum HSE  clock frequency.
+ * @brief   Maximum ADC clock frequency.
  */
 #define STM32_ADCCLK_MAX        36000000
 /** @} */