diff --git a/docs/design_docs/segcore/segment_growing.md b/docs/design_docs/segcore/segment_growing.md
index 1468240f47..5191d7b7f3 100644
--- a/docs/design_docs/segcore/segment_growing.md
+++ b/docs/design_docs/segcore/segment_growing.md
@@ -43,7 +43,7 @@ Used to manage concurrent inserted data, including:
 
 1. `atomic<int64_t> reserved` reserved space calculation
 2. `AckResponder` calculate which segment to insert, returns current segment offset
-3. `ConcurrentVector` store data columns, each column has one concurrent vector
+3. `ConcurrentVector` stores data columns, each column has one concurrent vector
 
 The following steps are executed when insert,