diff --git a/runtime/doc/rileft.txt b/runtime/doc/rileft.txt
index 7c5a60a..31a382b 100644
--- a/runtime/doc/rileft.txt
+++ b/runtime/doc/rileft.txt
@@ -35,6 +35,11 @@
 as this kind of support is out of the scope of a simple addition to an
 existing editor (and it's not sanctioned by Unicode either).
 
+As many people working on the code do not use the right-to-left mode, this
+feature may not work in some situations.  If you can describe what is wrong
+and how it would work when fixed, please create an issue on github, see
+|bug-reports|.
+
 
 Highlights
 ----------