diff --git a/hw/watchdog/wdt_diag288.c b/hw/watchdog/wdt_diag288.c
index a7b64e2c40..47f289216a 100644
--- a/hw/watchdog/wdt_diag288.c
+++ b/hw/watchdog/wdt_diag288.c
@@ -121,6 +121,7 @@ static void wdt_diag288_class_init(ObjectClass *klass, void *data)
     dc->realize = wdt_diag288_realize;
     dc->unrealize = wdt_diag288_unrealize;
     dc->reset = wdt_diag288_reset;
+    dc->hotpluggable = false;
     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
     dc->vmsd = &vmstate_diag288;
     diag288->handle_timer = wdt_diag288_handle_timer;