diff --git a/dts/arm/stm32f469i_disco.fixup b/dts/arm/stm32f469i_disco.fixup
index 69468e4940b..bb6d2883412 100644
--- a/dts/arm/stm32f469i_disco.fixup
+++ b/dts/arm/stm32f469i_disco.fixup
@@ -11,7 +11,7 @@
 #define CONFIG_UART_STM32_PORT_3_BASE_ADDRESS	ST_STM32_USART_40004800_BASE_ADDRESS
 #define CONFIG_UART_STM32_PORT_3_BAUD_RATE	ST_STM32_USART_40004800_CURRENT_SPEED
 #define CONFIG_UART_STM32_PORT_3_IRQ_PRI	ST_STM32_USART_40004800_IRQ_0_PRIORITY
-#define PORT_1_IRQ				ST_STM32_USART_40004800_IRQ_0
+#define PORT_3_IRQ				ST_STM32_USART_40004800_IRQ_0
 
 #define CONFIG_UART_STM32_PORT_6_NAME		ST_STM32_USART_40011400_LABEL
 #define CONFIG_UART_STM32_PORT_6_BASE_ADDRESS	ST_STM32_USART_40011400_BASE_ADDRESS