diff --git a/hw/pci/pcie_host.c b/hw/pci/pcie_host.c
index b70e5adc4bd06134ab808e601b981eacfb6fb0f3..410ac08cc663e2935e734876afd4ab86dd0991fc 100644
--- a/hw/pci/pcie_host.c
+++ b/hw/pci/pcie_host.c
@@ -104,9 +104,6 @@ static const MemoryRegionOps pcie_mmcfg_ops = {
     .endianness = DEVICE_NATIVE_ENDIAN,
 };
 
-/* pcie_host::base_addr == PCIE_BASE_ADDR_UNMAPPED when it isn't mapped. */
-#define PCIE_BASE_ADDR_UNMAPPED  ((hwaddr)-1ULL)
-
 int pcie_host_init(PCIExpressHost *e)
 {
     e->base_addr = PCIE_BASE_ADDR_UNMAPPED;
diff --git a/include/hw/pci/pcie_host.h b/include/hw/pci/pcie_host.h
index 1228e36cb260106c9c4133f2c6e51ccbfa2aa633..bac3c673d6b0af2e30f98083e47d0e2b1a143b79 100644
--- a/include/hw/pci/pcie_host.h
+++ b/include/hw/pci/pcie_host.h
@@ -28,6 +28,9 @@
 #define PCIE_HOST_BRIDGE(obj) \
     OBJECT_CHECK(PCIExpressHost, (obj), TYPE_PCIE_HOST_BRIDGE)
 
+/* pcie_host::base_addr == PCIE_BASE_ADDR_UNMAPPED when it isn't mapped. */
+#define PCIE_BASE_ADDR_UNMAPPED  ((hwaddr)-1ULL)
+
 struct PCIExpressHost {
     PCIHostState pci;