diff --git a/hw/pci.c b/hw/pci.c
index af74003..0765963 100644
--- a/hw/pci.c
+++ b/hw/pci.c
@@ -2016,12 +2016,6 @@
         pdev->config[PCI_STATUS] &= ~PCI_STATUS_CAP_LIST;
 }
 
-/* Reserve space for capability at a known offset (to call after load). */
-void pci_reserve_capability(PCIDevice *pdev, uint8_t offset, uint8_t size)
-{
-    memset(pdev->used + offset, 0xff, size);
-}
-
 uint8_t pci_find_capability(PCIDevice *pdev, uint8_t cap_id)
 {
     return pci_find_capability_list(pdev, cap_id, NULL);
diff --git a/hw/pci.h b/hw/pci.h
index c04b169..ce317bf 100644
--- a/hw/pci.h
+++ b/hw/pci.h
@@ -209,8 +209,6 @@
 
 void pci_del_capability(PCIDevice *pci_dev, uint8_t cap_id, uint8_t cap_size);
 
-void pci_reserve_capability(PCIDevice *pci_dev, uint8_t offset, uint8_t size);
-
 uint8_t pci_find_capability(PCIDevice *pci_dev, uint8_t cap_id);