diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/device/user.c b/drivers/gpu/drm/nouveau/nvkm/engine/device/user.c
index 113ddc103ac263dd86fcfb440cee0196f340af21..45f509c11c361ad9ed6c6ae3a7483094acbcf54a 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/device/user.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/device/user.c
@@ -346,6 +346,7 @@ nvkm_udevice_child_get(struct nvkm_object *object, int index,
 			return -EINVAL;
 
 		oclass->base = sclass->base;
+		oclass->engine = NULL;
 	}
 
 	oclass->ctor = nvkm_udevice_child_new;