diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index b7ae878..fd48b20 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -125,7 +125,7 @@
 /*
  * Find the extent of a PCI decode..
  */
-static u32 pci_size(u32 base, u32 maxbase, unsigned long mask)
+static u32 pci_size(u32 base, u32 maxbase, u32 mask)
 {
 	u32 size = mask & maxbase;	/* Find the significant bits */
 	if (!size)