diff --git a/arch/arm/src/stm32/stm32_adc.c b/arch/arm/src/stm32/stm32_adc.c
index 060cc6e1716..200f31d95c7 100644
--- a/arch/arm/src/stm32/stm32_adc.c
+++ b/arch/arm/src/stm32/stm32_adc.c
@@ -2808,10 +2808,10 @@ static int adc_interrupt(FAR struct adc_dev_s *dev)
         }
     }
 
-  /* by MR regval &= ~pending; */
-  /* by MR adc_putreg(priv, STM32_ADC_ISR_OFFSET, regval);
+  /* Clear pending interrupts */
+
+  adc_putreg(priv, STM32_ADC_ISR_OFFSET, pending);
 
-  adc_putreg(priv, STM32_ADC_ISR_OFFSET, pending); */
   return OK;
 }
 
diff --git a/arch/arm/src/stm32/stm32f33xxx_adc.c b/arch/arm/src/stm32/stm32f33xxx_adc.c
index a240de47999..252827e5e63 100644
--- a/arch/arm/src/stm32/stm32f33xxx_adc.c
+++ b/arch/arm/src/stm32/stm32f33xxx_adc.c
@@ -1895,10 +1895,10 @@ static int adc_interrupt(FAR struct adc_dev_s *dev)
         }
     }
 
-  /* by MR regval &= ~pending; */
-  /* by MR adc_putreg(priv, STM32_ADC_ISR_OFFSET, regval);
+  /* Clear pending interrupts */
+
+  adc_putreg(priv, STM32_ADC_ISR_OFFSET, pending);
 
-  adc_putreg(priv, STM32_ADC_ISR_OFFSET, pending); */
   return OK;
 }
 #endif