diff --git a/include/linux/ioport.h b/include/linux/ioport.h
index 87a9fc0..5612dfe 100644
--- a/include/linux/ioport.h
+++ b/include/linux/ioport.h
@@ -55,6 +55,7 @@
 #define IORESOURCE_IRQ_LOWEDGE		(1<<1)
 #define IORESOURCE_IRQ_HIGHLEVEL	(1<<2)
 #define IORESOURCE_IRQ_LOWLEVEL		(1<<3)
+#define IORESOURCE_IRQ_SHAREABLE	(1<<4)
 
 /* ISA PnP DMA specific bits (IORESOURCE_BITS) */
 #define IORESOURCE_DMA_TYPE_MASK	(3<<0)