diff --git a/src/vmspawn/vmspawn-qmp.h b/src/vmspawn/vmspawn-qmp.h
index 35cc029ea7..0bc73c90ab 100644
--- a/src/vmspawn/vmspawn-qmp.h
+++ b/src/vmspawn/vmspawn-qmp.h
@@ -5,6 +5,8 @@
 
 #include "shared-forward.h"
 
+#define VMSPAWN_PCIE_HOTPLUG_SPARES 10
+
 /* Pending job continuation — called when a QMP background job reaches "concluded" state.
  * Used by blockdev-create to chain remaining drive setup after the job completes. */
 typedef int (*pending_job_callback_t)(QmpClient *qmp, void *userdata);
diff --git a/src/vmspawn/vmspawn.c b/src/vmspawn/vmspawn.c
index 7ed21af77b..029ae4eacd 100644
--- a/src/vmspawn/vmspawn.c
+++ b/src/vmspawn/vmspawn.c
@@ -102,9 +102,6 @@
 #define DISK_SERIAL_MAX_LEN_NVME        20
 #define DISK_SERIAL_MAX_LEN_VIRTIO_BLK  20
 
-/* Spare pcie-root-ports reserved for future runtime hotplug beyond the pre-wired devices. */
-#define VMSPAWN_PCIE_HOTPLUG_SPARES 10u
-
 /* An enum controlling how auxiliary state for the VM are maintained, i.e. the TPM state and the EFI variable
  * NVRAM. */
 typedef enum StateMode {