diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c
index 54d9ed4..f9472c5 100644
--- a/arch/ia64/pci/pci.c
+++ b/arch/ia64/pci/pci.c
@@ -380,6 +380,7 @@
 	res->start = region->start + offset;
 	res->end = region->end + offset;
 }
+EXPORT_SYMBOL(pcibios_bus_to_resource);
 
 static int __devinit is_valid_resource(struct pci_dev *dev, int idx)
 {