diff --git a/hw/core/empty_slot.c b/hw/core/empty_slot.c
index 3ba450e1ca..5ab426e965 100644
--- a/hw/core/empty_slot.c
+++ b/hw/core/empty_slot.c
@@ -67,7 +67,7 @@ void empty_slot_init(hwaddr addr, uint64_t slot_size)
 
         qdev_init_nofail(dev);
 
-        sysbus_mmio_map(s, 0, addr);
+        sysbus_mmio_map_overlap(s, 0, addr, -10000);
     }
 }