diff --git a/vl.h b/vl.h
index 21525fdc922d10c00d3c60cfb5fc67f091c8b1b0..b881668fddc05cbb963cf8f951e5d8609367ec37 100644
--- a/vl.h
+++ b/vl.h
@@ -851,7 +851,7 @@ PCIBus *pci_grackle_init(uint32_t base, qemu_irq *pic);
 PCIBus *pci_pmac_init(qemu_irq *pic);
 
 /* apb_pci.c */
-PCIBus *pci_apb_init(target_ulong special_base, target_ulong mem_base,
+PCIBus *pci_apb_init(target_phys_addr_t special_base, target_phys_addr_t mem_base,
                      qemu_irq *pic);
 
 PCIBus *pci_vpb_init(qemu_irq *pic, int irq, int realview);