diff --git a/mercurial/util.py b/mercurial/util.py
--- a/mercurial/util.py
+++ b/mercurial/util.py
@@ -63,7 +63,7 @@ def fromlocal(s):
     Convert a string from the local character encoding to UTF-8
 
     We attempt to decode strings using the encoding mode set by
-    HG_ENCODINGMODE, which defaults to 'strict'. In this mode, unknown
+    HGENCODINGMODE, which defaults to 'strict'. In this mode, unknown
     characters will cause an error message. Other modes include
     'replace', which replaces unknown characters with a special
     Unicode character, and 'ignore', which drops the character.