diff --git a/include/linux/pci.h b/include/linux/pci.h
index b1d17956a1536ff9f1e913cc6f33410f2e54cfa8..c8d95e369ff441fe54760192ce4a0d9922f0508a 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1214,6 +1214,9 @@ static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
 						unsigned int devfn)
 { return NULL; }
 
+static inline int pci_domain_nr(struct pci_bus *bus)
+{ return 0; }
+
 #define dev_is_pci(d) (false)
 #define dev_is_pf(d) (false)
 #define dev_num_vf(d) (0)