diff --git a/src/include/device/device.h b/src/include/device/device.h
index 8e9454c..a200de0 100644
--- a/src/include/device/device.h
+++ b/src/include/device/device.h
@@ -289,6 +289,7 @@
 		pci_devfn_t devfn);
 DEVTREE_CONST struct device *pcidev_path_on_root(pci_devfn_t devfn);
 DEVTREE_CONST struct device *pcidev_on_root(uint8_t dev, uint8_t fn);
+DEVTREE_CONST struct bus *pci_root_bus(void);
 
 void scan_smbus(struct device *bus);
 void scan_generic_bus(struct device *bus);