diff --git a/drivers/serial/21285.c b/drivers/serial/21285.c
index aec39fb..b5cf394 100644
--- a/drivers/serial/21285.c
+++ b/drivers/serial/21285.c
@@ -463,7 +463,7 @@
 	return uart_set_options(port, co, baud, parity, bits, flow);
 }
 
-extern struct uart_driver serial21285_reg;
+static struct uart_driver serial21285_reg;
 
 static struct console serial21285_console =
 {