diff --git a/hw/block/fdc-isa.c b/hw/block/fdc-isa.c
index 0e22a10732d9..3bf64e06657b 100644
--- a/hw/block/fdc-isa.c
+++ b/hw/block/fdc-isa.c
@@ -282,6 +282,7 @@ static void isabus_fdc_class_init(ObjectClass *klass, void *data)
     DeviceClass *dc = DEVICE_CLASS(klass);
     ISADeviceClass *isa = ISA_DEVICE_CLASS(klass);
 
+    dc->desc = "virtual floppy controller";
     dc->realize = isabus_fdc_realize;
     dc->fw_name = "fdc";
     dc->reset = fdctrl_external_reset_isa;
diff --git a/hw/block/fdc-sysbus.c b/hw/block/fdc-sysbus.c
index c6308f53004f..57fc8773f124 100644
--- a/hw/block/fdc-sysbus.c
+++ b/hw/block/fdc-sysbus.c
@@ -205,6 +205,7 @@ static void sysbus_fdc_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
+    dc->desc = "virtual floppy controller";
     device_class_set_props(dc, sysbus_fdc_properties);
 }
 
@@ -230,6 +231,7 @@ static void sun4m_fdc_class_init(ObjectClass *klass, void *data)
     DeviceClass *dc = DEVICE_CLASS(klass);
 
     sbdc->use_strict_io = true;
+    dc->desc = "virtual floppy controller";
     device_class_set_props(dc, sun4m_fdc_properties);
 }