diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index 91c864d..4db9781 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -4994,6 +4994,25 @@
 	This option cannot be set from a |modeline| or in the |sandbox|, for
 	security reasons.
 
+					*'makeencoding'* *'menc'*
+'makeencoding' 'menc'	string	(default "")
+			global or local to buffer |global-local|
+			{only available when compiled with the |+multi_byte|
+			feature}
+			{not in Vi}
+	Encoding used for reading the output of external commands.  When empty,
+	encoding is not converted.
+	This is used for `:make`, `:lmake`, `:grep`, `:lgrep`, `:grepadd`,
+	`:lgrepadd`, `:cfile`, `:cgetfile`, `:caddfile`, `:lfile`, `:lgetfile`,
+	and `:laddfile`.
+
+	This would be mostly useful when you use MS-Windows and set 'encoding'
+	to "utf-8".  If |+iconv| is enabled and GNU libiconv is used, setting
+	'makeencoding' to "char" has the same effect as setting to the system
+	locale encoding.  Example: >
+		:set encoding=utf-8
+		:set makeencoding=char	" system locale is used
+<
 						*'makeprg'* *'mp'*
 'makeprg' 'mp'		string	(default "make", VMS: "MMS")
 			global or local to buffer |global-local|