diff --git a/docs/developer_guides/appendix_b_api_reference.md b/docs/developer_guides/appendix_b_api_reference.md
index ec4b3d6b36..af1ce5b7fb 100644
--- a/docs/developer_guides/appendix_b_api_reference.md
+++ b/docs/developer_guides/appendix_b_api_reference.md
@@ -183,7 +183,7 @@ message HasCollectionRequest {
 }
 ```
 
-The server finds the collection through **collection_name** and judge whether the collection exists.
+The server finds the collection through **collection_name** and checks whether the collection exists.
 
 **Returns:**