diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 7944b66..f01a75e 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -221,7 +221,7 @@
  */
 
 unsigned long pci_hose_phys_to_bus (struct pci_controller *hose,
-				    unsigned long phys_addr,
+				    phys_addr_t phys_addr,
 				    unsigned long flags)
 {
 	struct pci_region *res;
@@ -253,9 +253,9 @@
 	return 0;
 }
 
-unsigned long pci_hose_bus_to_phys(struct pci_controller* hose,
-				   unsigned long bus_addr,
-				   unsigned long flags)
+phys_addr_t pci_hose_bus_to_phys(struct pci_controller* hose,
+				 unsigned long bus_addr,
+				 unsigned long flags)
 {
 	struct pci_region *res;
 	int i;