diff --git a/internal/querycoord/task_scheduler.go b/internal/querycoord/task_scheduler.go
index 5fd9a0ac96..f0cf8fc304 100644
--- a/internal/querycoord/task_scheduler.go
+++ b/internal/querycoord/task_scheduler.go
@@ -263,7 +263,7 @@ func (scheduler *TaskScheduler) unmarshalTask(taskID UniqueID, t string) (task,
 	header := commonpb.MsgHeader{}
 	err := proto.Unmarshal([]byte(t), &header)
 	if err != nil {
-		return nil, fmt.Errorf("Failed to unmarshal message header, err %s ", err.Error())
+		return nil, fmt.Errorf("failed to unmarshal message header, err %s ", err.Error())
 	}
 	var newTask task
 	baseTask := newBaseTask(scheduler.ctx, querypb.TriggerCondition_grpcRequest)