diff --git a/ate/debugtalk.py b/ate/debugtalk.py
index 7b14f207..ffc1867d 100644
--- a/ate/debugtalk.py
+++ b/ate/debugtalk.py
@@ -1,3 +1,7 @@
+"""
+Built-in dependent functions used in YAML/JSON testcases.
+"""
+
 import datetime
 import random
 import string