diff --git a/flash.h b/flash.h
index 4d15816..d245824 100644
--- a/flash.h
+++ b/flash.h
@@ -389,6 +389,7 @@
 
 /* internal.c */
 struct pci_dev *pci_dev_find_filter(struct pci_filter filter);
+struct pci_dev *pci_dev_find_vendorclass(uint16_t vendor, uint16_t class);
 struct pci_dev *pci_dev_find(uint16_t vendor, uint16_t device);
 struct pci_dev *pci_card_find(uint16_t vendor, uint16_t device,
 			      uint16_t card_vendor, uint16_t card_device);