diff --git a/mercurial/repoview.py b/mercurial/repoview.py
--- a/mercurial/repoview.py
+++ b/mercurial/repoview.py
@@ -177,6 +177,9 @@
     b'base': computeimpactable,
 }
 
+# set of filter level that will include the working copy parent no matter what.
+filter_has_wc = {b'visible', b'visible-hidden'}
+
 _basefiltername = list(filtertable)