diff --git a/boards/stm32f030f4-demo/include/periph_conf.h b/boards/stm32f030f4-demo/include/periph_conf.h
index 7944efc7d2..5b7fe9e528 100644
--- a/boards/stm32f030f4-demo/include/periph_conf.h
+++ b/boards/stm32f030f4-demo/include/periph_conf.h
@@ -152,16 +152,16 @@ static const spi_conf_t spi_config[] = {
  * @name   ADC configuration
  * @{
  */
-#define ADC_CONFIG {            \
-    { GPIO_PIN(PORT_A, 0), 0 }, \
-    { GPIO_PIN(PORT_A, 1), 1 }, \
-    { GPIO_PIN(PORT_A, 2), 2 }, \
-    { GPIO_PIN(PORT_A, 3), 3 }, \
-    { GPIO_PIN(PORT_A, 4), 4 },\
-    { GPIO_PIN(PORT_A, 5), 5 } \
-}
+static const adc_conf_t adc_config[] = {
+    { GPIO_PIN(PORT_A, 0), 0 },
+    { GPIO_PIN(PORT_A, 1), 1 },
+    { GPIO_PIN(PORT_A, 2), 2 },
+    { GPIO_PIN(PORT_A, 3), 3 },
+    { GPIO_PIN(PORT_A, 4), 4 },
+    { GPIO_PIN(PORT_A, 5), 5 }
+};
 
-#define ADC_NUMOF           (6)
+#define ADC_NUMOF           ARRAY_SIZE(adc_config)
 /** @} */
 
 #ifdef __cplusplus