diff --git a/SftpFrontend.md b/SftpFrontend.md
index 4553a32..fdfef94 100644
--- a/SftpFrontend.md
+++ b/SftpFrontend.md
@@ -56,6 +56,8 @@ It may not be entirely clear to users whether a particular Gnome app is using GI
 
 The SFTP frontend encodes all filenames as UTF-8 when communicating with the client. Support for displaying and copying non-ASCII filenames is likely to vary between clients. If you are using a filesystem that represents names as UTF-8 (including via sshfs), then it should just work, but please report your experience with this. Note that SFTP currently does not perform any [Unicode normalization](http://en.wikipedia.org/wiki/Unicode_equivalence) (so for example, filenames copied from a Mac OS X filesystem will remain in NFD); this is likely to change in future.
 
+Many clients do not convert filenames to UTF-8; see ticket #1089.
+
 
 ### Performance