diff --git a/drivers/gpu/nvgpu/gk20a/gr_gk20a.c b/drivers/gpu/nvgpu/gk20a/gr_gk20a.c
index ab3f18ba2..9ed4febb1 100644
--- a/drivers/gpu/nvgpu/gk20a/gr_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/gr_gk20a.c
@@ -551,7 +551,7 @@ int gr_gk20a_halt_pipe(struct gk20a *g)
 				gr_fecs_method_push_adr_halt_pipeline_v(),
 		      .method.data = ~0,
 		      .mailbox = { .id   = 1, /*sideband?*/
-				.data = ~0, .clr = ~0, .ret = 0,
+				.data = ~0, .clr = ~0, .ret = NULL,
 				.ok   = gr_fecs_ctxsw_mailbox_value_pass_v(),
 				.fail = gr_fecs_ctxsw_mailbox_value_fail_v(), },
 		      .cond.ok = GR_IS_UCODE_OP_EQUAL,