diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/chang84.c b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/chang84.c
index 353b77d9b3dcffe35f12172e36e24b75cd454950..3492c561f2cfc858c4f776e1fd3d754d0136d544 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/chang84.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/chang84.c
@@ -82,7 +82,7 @@ g84_fifo_chan_engine_fini(struct nvkm_fifo_chan *base,
 	if (offset < 0)
 		return 0;
 
-	engn = fifo->base.func->engine_id(&fifo->base, engine);
+	engn = fifo->base.func->engine_id(&fifo->base, engine) - 1;
 	save = nvkm_mask(device, 0x002520, 0x0000003f, 1 << engn);
 	nvkm_wr32(device, 0x0032fc, chan->base.inst->addr >> 12);
 	done = nvkm_msec(device, 2000,