diff --git a/include/linux/of_pci.h b/include/linux/of_pci.h
index f93e217..bb115de 100644
--- a/include/linux/of_pci.h
+++ b/include/linux/of_pci.h
@@ -5,7 +5,7 @@
 
 struct pci_dev;
 struct of_irq;
-int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq);
+int of_irq_map_pci(const struct pci_dev *pdev, struct of_irq *out_irq);
 
 struct device_node;
 struct device_node *of_pci_find_child_device(struct device_node *parent,