diff --git a/drivers/tty/serial/Makefile b/drivers/tty/serial/Makefile
index 2d6288bc4554..53c03e005132 100644
--- a/drivers/tty/serial/Makefile
+++ b/drivers/tty/serial/Makefile
@@ -3,7 +3,6 @@
 #
 
 obj-$(CONFIG_SERIAL_CORE) += serial_core.o
-obj-$(CONFIG_SERIAL_21285) += 21285.o
 
 obj-$(CONFIG_SERIAL_EARLYCON) += earlycon.o
 obj-$(CONFIG_SERIAL_EARLYCON_ARM_SEMIHOST) += earlycon-arm-semihost.o
@@ -17,6 +16,8 @@ obj-$(CONFIG_SERIAL_SUNZILOG) += sunzilog.o
 obj-$(CONFIG_SERIAL_SUNSU) += sunsu.o
 obj-$(CONFIG_SERIAL_SUNSAB) += sunsab.o
 
+obj-$(CONFIG_SERIAL_21285) += 21285.o
+
 # Now bring in any enabled 8250/16450/16550 type drivers.
 obj-$(CONFIG_SERIAL_8250) += 8250/