diff --git a/setup.py b/setup.py
--- a/setup.py
+++ b/setup.py
@@ -1541,7 +1541,7 @@
 packagedata = {
     'mercurial': [
         'locale/*/LC_MESSAGES/hg.mo',
-        'default.d/*.rc',
+        'defaultrc/*.rc',
         'dummycert.pem',
     ],
     'mercurial.helptext': ['*.txt',],