diff --git a/boards/nucleo-f413zh/include/periph_conf.h b/boards/nucleo-f413zh/include/periph_conf.h
index 747ba70121..3b7d38b8e3 100644
--- a/boards/nucleo-f413zh/include/periph_conf.h
+++ b/boards/nucleo-f413zh/include/periph_conf.h
@@ -172,15 +172,16 @@ static const spi_conf_t spi_config[] = {
  *
  * @{
  */
-#define ADC_NUMOF          (6U)
-#define ADC_CONFIG {              \
-    {GPIO_PIN(PORT_A, 3), 0, 3},  \
-    {GPIO_PIN(PORT_C, 0), 0, 10}, \
-    {GPIO_PIN(PORT_C, 3), 0, 13}, \
-    {GPIO_PIN(PORT_C, 1), 0, 11}, \
-    {GPIO_PIN(PORT_C, 4), 0, 14}, \
-    {GPIO_PIN(PORT_C, 5), 0, 15}, \
-}
+static const adc_conf_t adc_config[] = {
+    {GPIO_PIN(PORT_A, 3), 0, 3},
+    {GPIO_PIN(PORT_C, 0), 0, 10},
+    {GPIO_PIN(PORT_C, 3), 0, 13},
+    {GPIO_PIN(PORT_C, 1), 0, 11},
+    {GPIO_PIN(PORT_C, 4), 0, 14},
+    {GPIO_PIN(PORT_C, 5), 0, 15},
+};
+
+#define ADC_NUMOF           ARRAY_SIZE(adc_config)
 /** @} */
 
 /**