diff --git a/setup.cfg b/setup.cfg
index 559dbe31a..1a805468f 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -59,6 +59,7 @@ ci =
 
 [flake8]
 ignore = E501, W504,
+         # ambiguous variable name
          E741
 builtins = ufl
 exclude = .git,__pycache__,doc/sphinx/source/conf.py,build,dist,test