diff --git a/include/linux/pci.h b/include/linux/pci.h
index ee21795..eca3231 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -35,6 +35,8 @@
 /* Include the ID list */
 #include <linux/pci_ids.h>
 
+#define PCI_MAX_FUNCTIONS 8
+
 /* pci_slot represents a physical slot */
 struct pci_slot {
 	struct pci_bus *bus;		/* The bus this slot is on */