diff --git a/drivers/serial/uart_b91.c b/drivers/serial/uart_b91.c
index cb2d7ebd190..e2502f4fd9b 100644
--- a/drivers/serial/uart_b91.c
+++ b/drivers/serial/uart_b91.c
@@ -11,6 +11,7 @@
 #include <zephyr/drivers/uart.h>
 #include <zephyr/drivers/pinctrl.h>
 #include <zephyr/irq.h>
+#include <zephyr/drivers/interrupt_controller/riscv_plic.h>
 
 
 /* Driver dts compatibility: telink,b91_uart */