diff --git a/docs/developer_guides/chap05_proxy.md b/docs/developer_guides/chap05_proxy.md
index 2fe3e111ce..3b94bba484 100644
--- a/docs/developer_guides/chap05_proxy.md
+++ b/docs/developer_guides/chap05_proxy.md
@@ -523,7 +523,7 @@ func newDmTaskQueue() *dmTaskQueue
 
 Insert tasks and delete tasks will be pushed into _DmTaskQueue_.
 
-If a _insertTask_ is enqueued, _Enqueue(task \*task)_ will set _Ts_, _ReqId_, _ProxyId_, _SegIdAssigner_, _RowIdAllocator_, then push it into _queue_. The _SegIdAssigner_ and _RowIdAllocator_ will later be used in the task's execution phase.
+If an _insertTask_ is enqueued, _Enqueue(task \*task)_ will set _Ts_, _ReqId_, _ProxyId_, _SegIdAssigner_, _RowIdAllocator_, then push it into _queue_. The _SegIdAssigner_ and _RowIdAllocator_ will later be used in the task's execution phase.
 
 - Data Query Task Queue