diff --git a/port/moonlight/inc/uart.h b/port/moonlight/inc/uart.h
index 2cbd72f..caf3703 100644
--- a/port/moonlight/inc/uart.h
+++ b/port/moonlight/inc/uart.h
@@ -33,4 +33,8 @@ static inline uint8_t uart_read(volatile uart_t* reg)
     return res;
 }
 
+static inline int uart_init(void)
+{
+    return 0;
+}
 #endif /* _DEVICES_UART_H */