--- a/mercurial/cmdutil.py	Sun Dec 17 18:28:15 2017 +0900
+++ b/mercurial/cmdutil.py	Sun Dec 17 18:43:05 2017 +0900
@@ -1514,7 +1514,7 @@
                     match.uipath(matchroot), uirelroot))
 
     if stat:
-        diffopts = diffopts.copy(context=0)
+        diffopts = diffopts.copy(context=0, noprefix=False)
         width = 80
         if not ui.plain():
             width = ui.termwidth()