diff --git a/doc/source/config.rst b/doc/source/config.rst
index 0b8b7378..67014ad3 100644
--- a/doc/source/config.rst
+++ b/doc/source/config.rst
@@ -73,7 +73,8 @@ Rules can be split into lines and contain whitespace for easier readability and
 The terminating ``;`` is optional for now, but it should be used for future compatibility.
 
 Rules, including comments, needs to be written in ASCII, other encodings aren't
-supported and might cause syntax errors and related issues.
+supported and might cause syntax errors and related issues like making
+all rules after non-ASCII symbols not considered for execution and silently discarded.
 
 Miscellaneous
 -------------