diff --git a/pymysql/constants/CR.py b/pymysql/constants/CR.py
index 361414c..48ca956 100644
--- a/pymysql/constants/CR.py
+++ b/pymysql/constants/CR.py
@@ -1,3 +1,4 @@
+# flake8: noqa
 # errmsg.h
 CR_ERROR_FIRST  	= 2000
 CR_UNKNOWN_ERROR	= 2000