diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h
index 3b0c9a251a2e..2673a1bd82c4 100644
--- a/include/linux/mod_devicetable.h
+++ b/include/linux/mod_devicetable.h
@@ -640,7 +640,11 @@ struct mdio_device_id {
 
 struct zorro_device_id {
 	__u32 id;			/* Device ID or ZORRO_WILDCARD */
-	kernel_ulong_t driver_data;	/* Data private to the driver */
+	union {
+		/* Data private to the driver */
+		kernel_ulong_t driver_data;
+		const void *driver_data_ptr;
+	};
 };
 
 #define ZORRO_WILDCARD			(0xffffffff)	/* not official */