diff --git a/drivers/serial/21285.c b/drivers/serial/21285.c
index 221999b..7aef751 100644
--- a/drivers/serial/21285.c
+++ b/drivers/serial/21285.c
@@ -366,7 +366,7 @@
 	.irq		= NO_IRQ,
 	.fifosize	= 16,
 	.ops		= &serial21285_ops,
-	.flags		= ASYNC_BOOT_AUTOCONF,
+	.flags		= UPF_BOOT_AUTOCONF,
 };
 
 static void serial21285_setup_ports(void)