diff --git a/cssutils/css/selector.py b/cssutils/css/selector.py
index 7f66a2a2..4bf3a6d7 100644
--- a/cssutils/css/selector.py
+++ b/cssutils/css/selector.py
@@ -330,7 +330,7 @@ def _setSelectorText(self, selectorText):  # noqa: C901
             # used for equality checks and setting of a space combinator
             S = ' '
 
-            def append(seq, val, typ=None, token=None):
+            def append(seq, val, typ=None, token=None):  # noqa: C901
                 """
                 appends to seq