diff --git a/src/features/preprocess_ki.py b/src/features/preprocess_ki.py
index 0efe1de..9570aaa 100644
--- a/src/features/preprocess_ki.py
+++ b/src/features/preprocess_ki.py
@@ -1,4 +1,4 @@
-
+"""Preprocess annnotations with KITTI ground-truth"""
 import os
 import glob
 import math