diff -pNaru5 a/driver/mxusbserial/mxusb-serial.c b/driver/mxusbserial/mxusb-serial.c
--- a/driver/mxusbserial/mxusb-serial.c	2023-12-18 22:26:56.544609750 -0500
+++ b/driver/mxusbserial/mxusb-serial.c	2023-12-18 22:27:01.967913954 -0500
@@ -633,12 +633,16 @@ static void serial_close(struct tty_stru
 
 }
 #endif
 
 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,9))
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(6,6,0))
 static int serial_write (struct tty_struct * tty, const unsigned char *buf, int count)
 #else
+static ssize_t serial_write (struct tty_struct * tty, const u8 *buf, size_t count)
+#endif
+#else
 static int serial_write (struct tty_struct * tty, int from_user, const unsigned char *buf, int count)
 #endif
 {
 	struct usb_serial_port *port = tty->driver_data;
 	int retval = -EINVAL;