diff --git a/os/hal/platforms/STM32L1xx/adc_lld.c b/os/hal/platforms/STM32L1xx/adc_lld.c
index 428d8e452..3d91a9991 100644
--- a/os/hal/platforms/STM32L1xx/adc_lld.c
+++ b/os/hal/platforms/STM32L1xx/adc_lld.c
@@ -162,10 +162,10 @@ void adc_lld_start(ADCDriver *adcp) {
     }
 #endif /* STM32_ADC_USE_ADC1 */
 
-
     /* ADC initial setup, starting the analog part here in order to reduce
        the latency when starting a conversion.*/
     adcp->adc->CR1 = 0;
+    adcp->adc->CR2 = 0;
     adcp->adc->CR2 = ADC_CR2_ADON;
   }
 }