diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index 291ab83..790e66c 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -921,7 +921,7 @@
 
 						*'backupcopy'* *'bkc'*
 'backupcopy' 'bkc'	string	(Vi default for Unix: "yes", otherwise: "auto")
-			global
+			global or local to buffer |global-local|
 			{not in Vi}
 	When writing a file and a backup is made, this option tells how it's
 	done.  This is a comma separated list of words.