diff --git a/docs/content/box.md b/docs/content/box.md
index fd1c6bc0b..1198f8bcd 100644
--- a/docs/content/box.md
+++ b/docs/content/box.md
@@ -404,6 +404,7 @@ Note that Box is case insensitive so you can't have a file called
 "Hello.doc" and one called "hello.doc".
 
 Box file names can't have the `\` character in.  rclone maps this to
-and from an identical looking unicode equivalent `＼`.
+and from an identical looking unicode equivalent `＼` (U+FF3C Fullwidth
+Reverse Solidus).
 
 Box only supports filenames up to 255 characters in length.