diff --git a/boards/nucleo-f446ze/include/periph_conf.h b/boards/nucleo-f446ze/include/periph_conf.h
index a799c9676e..0946b5c172 100644
--- a/boards/nucleo-f446ze/include/periph_conf.h
+++ b/boards/nucleo-f446ze/include/periph_conf.h
@@ -197,6 +197,7 @@ static const adc_conf_t adc_config[] = {
     { .pin = GPIO_PIN(PORT_B, 0), .dev = 2, .chan =  9 }, /* ADC123_IN9   */
     { .pin = GPIO_PIN(PORT_C, 1), .dev = 2, .chan = 15 }, /* ADC3_IN15    */
     { .pin = GPIO_PIN(PORT_C, 0), .dev = 2, .chan =  8 }, /* ADC3_IN8     */
+    { .pin = GPIO_UNDEF, 	  .dev = 0, .chan = 18 }, /* VBAT */
 };
 
 /**
@@ -204,6 +205,8 @@ static const adc_conf_t adc_config[] = {
  */
 #define ADC_NUMOF           ARRAY_SIZE(adc_config)
 
+#define VBAT_ADC            ADC_LINE(6) /**< VBAT ADC line */
+
 /** @} */
 
 #ifdef __cplusplus