diff --git a/arch/sparc64/kernel/irq.c b/arch/sparc64/kernel/irq.c
index c9b6916..233526b 100644
--- a/arch/sparc64/kernel/irq.c
+++ b/arch/sparc64/kernel/irq.c
@@ -27,6 +27,7 @@
 #include <asm/atomic.h>
 #include <asm/system.h>
 #include <asm/irq.h>
+#include <asm/io.h>
 #include <asm/sbus.h>
 #include <asm/iommu.h>
 #include <asm/upa.h>