diff --git a/include/linux/pnp.h b/include/linux/pnp.h
index 0a0426c..2a6d62c 100644
--- a/include/linux/pnp.h
+++ b/include/linux/pnp.h
@@ -13,7 +13,7 @@
 #include <linux/errno.h>
 #include <linux/mod_devicetable.h>
 
-#define PNP_MAX_PORT		24
+#define PNP_MAX_PORT		40
 #define PNP_MAX_MEM		12
 #define PNP_MAX_IRQ		2
 #define PNP_MAX_DMA		2