diff --git a/os/hal/ports/STM32/LLD/ADCv3/hal_adc_lld.c b/os/hal/ports/STM32/LLD/ADCv3/hal_adc_lld.c
index 3108f3e3b..3a328ae0f 100644
--- a/os/hal/ports/STM32/LLD/ADCv3/hal_adc_lld.c
+++ b/os/hal/ports/STM32/LLD/ADCv3/hal_adc_lld.c
@@ -160,7 +160,7 @@ static void adc_lld_vreg_off(ADCDriver *adcp) {
 }
 
 /**
- * @brief   Calibrates and ADC unit.
+ * @brief   Calibrates an ADC unit.
  *
  * @param[in] adcp      pointer to the @p ADCDriver object
  */
diff --git a/os/hal/ports/STM32/LLD/ADCv4/hal_adc_lld.c b/os/hal/ports/STM32/LLD/ADCv4/hal_adc_lld.c
index 12984268b..376705409 100644
--- a/os/hal/ports/STM32/LLD/ADCv4/hal_adc_lld.c
+++ b/os/hal/ports/STM32/LLD/ADCv4/hal_adc_lld.c
@@ -162,7 +162,7 @@ static void adc_lld_analog_off(ADCDriver *adcp) {
 }
 
 /**
- * @brief   Calibrates and ADC unit.
+ * @brief   Calibrates an ADC unit.
  *
  * @param[in] adcp      pointer to the @p ADCDriver object
  */