diff --git a/preprocess_custom_data/readme.md b/preprocess_custom_data/readme.md
index 4ce3d18..d92ecba 100755
--- a/preprocess_custom_data/readme.md
+++ b/preprocess_custom_data/readme.md
@@ -66,7 +66,7 @@ And you may need to clean it by yourself (here we use Meshlab to clean it manual
 
 ![interest_sparse_points](./static/interest_sparse_points.png)
 
-Save it as `${data_dir}/sparse_point_interest.ply`.
+Save it as `${data_dir}/sparse_points_interest.ply`.
 
 Then run the commands: