diff --git a/src/_pytest/mark/structures.py b/src/_pytest/mark/structures.py
index 3fb15bbc2..3c161c4a6 100644
--- a/src/_pytest/mark/structures.py
+++ b/src/_pytest/mark/structures.py
@@ -294,7 +294,7 @@ def _marked(func, mark):
 class MarkInfo(object):
     """ Marking object created by :class:`MarkDecorator` instances. """
 
-    _marks = attr.ib(convert=list)
+    _marks = attr.ib(converter=list)
 
     @_marks.validator
     def validate_marks(self, attribute, value):