diff --git a/arch/alpha/kernel/sys_marvel.c b/arch/alpha/kernel/sys_marvel.c
index 407accc..c92e389 100644
--- a/arch/alpha/kernel/sys_marvel.c
+++ b/arch/alpha/kernel/sys_marvel.c
@@ -317,8 +317,9 @@
 }
 
 static int 
-marvel_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
+marvel_map_irq(const struct pci_dev *cdev, u8 slot, u8 pin)
 {
+	struct pci_dev *dev = (struct pci_dev *)cdev;
 	struct pci_controller *hose = dev->sysdata;
 	struct io7_port *io7_port = hose->sysdata;
 	struct io7 *io7 = io7_port->io7;