diff --git a/intern/cycles/device/device_task.h b/intern/cycles/device/device_task.h
index 0c23d8971e0..834ea60988a 100644
--- a/intern/cycles/device/device_task.h
+++ b/intern/cycles/device/device_task.h
@@ -65,6 +65,7 @@ public:
 
 	bool need_finish_queue;
 	bool integrator_branched;
+	int2 requested_tile_size;
 protected:
 	double last_update_time;
 };
diff --git a/intern/cycles/render/session.cpp b/intern/cycles/render/session.cpp
index 82197d5340a..9ef1c1f4f1f 100644
--- a/intern/cycles/render/session.cpp
+++ b/intern/cycles/render/session.cpp
@@ -859,6 +859,7 @@ void Session::path_trace()
 	task.update_progress_sample = function_bind(&Session::update_progress_sample, this);
 	task.need_finish_queue = params.progressive_refine;
 	task.integrator_branched = scene->integrator->method == Integrator::BRANCHED_PATH;
+	task.requested_tile_size = params.tile_size;
 
 	device->task_add(task);
 }