diff --git a/arch/arm/include/asm/armv7.h b/arch/arm/include/asm/armv7.h
index dc9561c..edb3b80 100644
--- a/arch/arm/include/asm/armv7.h
+++ b/arch/arm/include/asm/armv7.h
@@ -58,6 +58,7 @@
 
 #ifndef __ASSEMBLY__
 #include <linux/types.h>
+#include <asm/io.h>
 
 /*
  * CP15 Barrier instructions