--- a/mercurial/configitems.py	Sat Jun 17 13:08:03 2017 +0200
+++ b/mercurial/configitems.py	Sat Jun 17 13:17:10 2017 +0200
@@ -36,6 +36,9 @@
 
 # Registering actual config items
 
+coreconfigitem('patch', 'fuzz',
+    default=2,
+)
 coreconfigitem('ui', 'quiet',
     default=False,
 )