diff --git a/boards/arm/stm32/stm32f401rc-rs485/src/stm32_adc.c b/boards/arm/stm32/stm32f401rc-rs485/src/stm32_adc.c
index a8a60d7a591..a31a7a7174a 100644
--- a/boards/arm/stm32/stm32f401rc-rs485/src/stm32_adc.c
+++ b/boards/arm/stm32/stm32f401rc-rs485/src/stm32_adc.c
@@ -66,8 +66,8 @@ static const uint8_t  g_adc1_chanlist[ADC1_NCHANNELS] =
 
 static const uint32_t g_adc1_pinlist[ADC1_NCHANNELS]  =
 {
-  GPIO_ADC\1_IN\2_0,
-  GPIO_ADC\1_IN\2_0
+  GPIO_ADC1_IN0_0,
+  GPIO_ADC1_IN4_0
 };
 
 /****************************************************************************