diff --git a/hw/fdc.c b/hw/fdc.c
index 06f3a2c..d2bfa71 100644
--- a/hw/fdc.c
+++ b/hw/fdc.c
@@ -1997,6 +1997,7 @@
     .init = isabus_fdc_init1,
     .qdev.name  = "isa-fdc",
     .qdev.size  = sizeof(fdctrl_isabus_t),
+    .qdev.no_user = 1,
     .qdev.vmsd  = &vmstate_fdc,
     .qdev.reset = fdctrl_external_reset_isa,
     .qdev.props = (Property[]) {
diff --git a/hw/ide/piix.c b/hw/ide/piix.c
index 8958d56..a4756e0 100644
--- a/hw/ide/piix.c
+++ b/hw/ide/piix.c
@@ -179,10 +179,12 @@
     {
         .qdev.name    = "PIIX3 IDE",
         .qdev.size    = sizeof(PCIIDEState),
+        .qdev.no_user = 1,
         .init         = pci_piix3_ide_initfn,
     },{
         .qdev.name    = "PIIX4 IDE",
         .qdev.size    = sizeof(PCIIDEState),
+        .qdev.no_user = 1,
         .init         = pci_piix4_ide_initfn,
     },{
         /* end of list */