diff --git a/drivers/pnp/base.h b/drivers/pnp/base.h
index 9fd7bb9..7cc7bf5 100644
--- a/drivers/pnp/base.h
+++ b/drivers/pnp/base.h
@@ -147,7 +147,7 @@
 void dbg_pnp_show_resources(struct pnp_dev *dev, char *desc);
 
 void pnp_free_resources(struct pnp_dev *dev);
-int pnp_resource_type(struct resource *res);
+unsigned long pnp_resource_type(struct resource *res);
 
 struct pnp_resource {
 	struct list_head list;