diff --git a/hw/scsi/vmw_pvscsi.c b/hw/scsi/vmw_pvscsi.c
index be95cff5e7..e785b8b6ec 100644
--- a/hw/scsi/vmw_pvscsi.c
+++ b/hw/scsi/vmw_pvscsi.c
@@ -1194,6 +1194,8 @@ static const VMStateDescription vmstate_pvscsi = {
 
 static Property pvscsi_properties[] = {
     DEFINE_PROP_UINT8("use_msg", PVSCSIState, use_msg, 1),
+    DEFINE_PROP_BIT("x-old-pci-configuration", PVSCSIState, compat_flags,
+                    PVSCSI_COMPAT_OLD_PCI_CONFIGURATION_BIT, false),
     DEFINE_PROP_END_OF_LIST(),
 };
 
diff --git a/include/hw/compat.h b/include/hw/compat.h
index d0b1c4f1ef..66e4affa98 100644
--- a/include/hw/compat.h
+++ b/include/hw/compat.h
@@ -6,6 +6,10 @@
             .driver   = "virtio-blk-device",\
             .property = "scsi",\
             .value    = "true",\
+        },{\
+            .driver   = "pvscsi",\
+            .property = "x-old-pci-configuration",\
+            .value    = "on",\
         },{\
             .driver   = "e1000",\
             .property = "extra_mac_registers",\