diff --git a/flask/app.py b/flask/app.py
index 90aedf1d..59c77a15 100644
--- a/flask/app.py
+++ b/flask/app.py
@@ -519,7 +519,7 @@ class Flask(_PackageBoundObject):
         #:        def to_python(self, value):
         #:            return value.split(',')
         #:        def to_url(self, values):
-        #:            return ','.join(BaseConverter.to_url(value)
+        #:            return ','.join(super(ListConverter, self).to_url(value)
         #:                            for value in values)
         #:
         #:    app = Flask(__name__)