diff --git a/arch/arm/kernel/isa.c b/arch/arm/kernel/isa.c
index 50a30bc91872..8ac9b8424007 100644
--- a/arch/arm/kernel/isa.c
+++ b/arch/arm/kernel/isa.c
@@ -16,6 +16,7 @@
 #include <linux/fs.h>
 #include <linux/sysctl.h>
 #include <linux/init.h>
+#include <linux/io.h>
 
 static unsigned int isa_membase, isa_portbase, isa_portshift;