diff --git a/src/soc/samsung/exynos5420/cpu.c b/src/soc/samsung/exynos5420/cpu.c
index fa4cd06..1c354e6 100644
--- a/src/soc/samsung/exynos5420/cpu.c
+++ b/src/soc/samsung/exynos5420/cpu.c
@@ -16,6 +16,7 @@
 
 #include <arch/cache.h>
 #include <console/console.h>
+#include <device/mmio.h>
 #include <delay.h>
 #include <device/device.h>
 #include <ec/google/chromeec/ec.h>