diff --git a/include/asm-sh/hd64461.h b/include/asm-sh/hd64461.h
index 4dd8592..342ca55 100644
--- a/include/asm-sh/hd64461.h
+++ b/include/asm-sh/hd64461.h
@@ -226,6 +226,7 @@
 #define	HD64461_NIMR		(CONFIG_HD64461_IOBASE + 0x5002)
 
 #define	HD64461_IRQBASE		OFFCHIP_IRQ_BASE
+#define	OFFCHIP_IRQ_BASE	64
 #define	HD64461_IRQ_NUM		16
 
 #define	HD64461_IRQ_UART	(HD64461_IRQBASE+5)