diff --git a/arch/arm64/mm/mmap.c b/arch/arm64/mm/mmap.c
index c66b3878712c2adcb3317f924c4434fb6d0eff0a..a38f54cd638c265da6f42ff53cc76b879de99312 100644
--- a/arch/arm64/mm/mmap.c
+++ b/arch/arm64/mm/mmap.c
@@ -5,6 +5,7 @@
  * Copyright (C) 2012 ARM Ltd.
  */
 
+#include <linux/io.h>
 #include <linux/memblock.h>
 #include <linux/types.h>