diff --git a/src/soc/samsung/exynos5250/Makefile.inc b/src/soc/samsung/exynos5250/Makefile.inc
index cc89f2d7b5..735ce2e867 100644
--- a/src/soc/samsung/exynos5250/Makefile.inc
+++ b/src/soc/samsung/exynos5250/Makefile.inc
@@ -21,9 +21,7 @@ romstage-y += dmc_init_ddr3.c
 romstage-y += power.c
 romstage-y += mct.c
 romstage-y += monotonic_timer.c
-ifeq ($(CONFIG_DRIVERS_UART),y)
-romstage-y += uart.c
-endif
+romstage-$(CONFIG_DRIVERS_UART) += uart.c
 romstage-y += wakeup.c
 romstage-y += gpio.c
 romstage-y += timer.c
diff --git a/src/soc/samsung/exynos5420/Makefile.inc b/src/soc/samsung/exynos5420/Makefile.inc
index 5f37e7eba5..ac22620f38 100644
--- a/src/soc/samsung/exynos5420/Makefile.inc
+++ b/src/soc/samsung/exynos5420/Makefile.inc
@@ -22,9 +22,7 @@ romstage-y += dmc_init_ddr3.c
 romstage-y += power.c
 romstage-y += mct.c
 romstage-y += monotonic_timer.c
-ifeq ($(CONFIG_DRIVERS_UART),y)
-romstage-y += uart.c
-endif
+romstage-$(CONFIG_DRIVERS_UART) += uart.c
 romstage-y += wakeup.c
 romstage-y += gpio.c
 romstage-y += timer.c