diff --git a/docs/design_docs/milvus_create_index_en.md b/docs/design_docs/milvus_create_index_en.md
index 10ad510762..13f3541235 100644
--- a/docs/design_docs/milvus_create_index_en.md
+++ b/docs/design_docs/milvus_create_index_en.md
@@ -178,7 +178,7 @@ message CreateIndexRequest {
 }
 ```
 
-13. When receive `CreateIndex` request, `IndexNode` would wrap this request into `IndexBuildTask`, and push this task into `IndexBuildQueue`, then send response to `IndexCoord`
+13. When receive `CreateIndex` request, `IndexNode` would wrap this request into `IndexBuildTask`, and push this task into `IndexBuildQueue`, then send response to `IndexCoord`.
 
 14. There is a background service, `indexBuildLoop`, in the `IndexNode`. `indexBuildLoop` would call `scheduleIndexBuildTask` to get a `IndexBuildTask` from `IndexBuildQueue`, and then start another `goroutine` to build index and update meta.