diff --git a/sw/airborne/boards/stm32f4_discovery.h b/sw/airborne/boards/stm32f4_discovery.h
index e41d1e0322..c715ae9f37 100644
--- a/sw/airborne/boards/stm32f4_discovery.h
+++ b/sw/airborne/boards/stm32f4_discovery.h
@@ -325,7 +325,7 @@
 // AUX 3
 #if USE_ADC_3
 #define AD2_1_CHANNEL 14
-#define ADC_3 ADC2_C1 // THIS CHANNEL USES THE ADC 2 CONVERTER
+#define ADC_3 AD2_1 // THIS CHANNEL USES THE ADC 2 CONVERTER
 #define ADC_3_GPIO_PORT GPIOC
 #define ADC_3_GPIO_PIN GPIO4
 #endif