diff --git a/include/linux/pci.h b/include/linux/pci.h
index 87aab07..4b4d711 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -309,8 +309,8 @@
 extern struct pci_raw_ops *raw_pci_ops;
 
 struct pci_bus_region {
-	unsigned long start;
-	unsigned long end;
+	resource_size_t start;
+	resource_size_t end;
 };
 
 struct pci_dynids {