diff --git a/arch/arm/mach-uniphier/dram_init.c b/arch/arm/mach-uniphier/dram_init.c
index 7e7c1d98db..fa4b3e386b 100644
--- a/arch/arm/mach-uniphier/dram_init.c
+++ b/arch/arm/mach-uniphier/dram_init.c
@@ -7,6 +7,7 @@
 
 #include <common.h>
 #include <linux/errno.h>
+#include <linux/io.h>
 #include <linux/kernel.h>
 #include <linux/printk.h>
 #include <linux/sizes.h>