diff --git a/hw/pci.h b/hw/pci.h
index 9a56d0d..d3378d3 100644
--- a/hw/pci.h
+++ b/hw/pci.h
@@ -293,8 +293,6 @@ PCIDevice *pci_nic_init(NICInfo *nd, const char *default_model,
                         const char *default_devaddr);
 PCIDevice *pci_nic_init_nofail(NICInfo *nd, const char *default_model,
                                const char *default_devaddr);
-void pci_data_write(PCIBus *s, uint32_t addr, uint32_t val, int len);
-uint32_t pci_data_read(PCIBus *s, uint32_t addr, int len);
 int pci_bus_num(PCIBus *s);
 void pci_for_each_device(PCIBus *bus, int bus_num, void (*fn)(PCIBus *bus, PCIDevice *d));
 PCIBus *pci_find_host_bus(int domain);
diff --git a/hw/pci_host.h b/hw/pci_host.h
index e5e877f..7cfa693 100644
--- a/hw/pci_host.h
+++ b/hw/pci_host.h
@@ -36,6 +36,9 @@ typedef struct {
     PCIBus *bus;
 } PCIHostState;
 
+void pci_data_write(PCIBus *s, uint32_t addr, uint32_t val, int len);
+uint32_t pci_data_read(PCIBus *s, uint32_t addr, int len);
+
 /* for mmio */
 int pci_host_config_register_io_memory(PCIHostState *s);
 int pci_host_config_register_io_memory_noswap(PCIHostState *s);