diff --git a/doc/pages/highlighters.asciidoc b/doc/pages/highlighters.asciidoc
index ed81ead5..ab6e169a 100644
--- a/doc/pages/highlighters.asciidoc
+++ b/doc/pages/highlighters.asciidoc
@@ -105,9 +105,9 @@ add-highlighter window regex //\h*(TODO:)[^\n]* 0:cyan 1:yellow,red
     given expression before building a regex from the result.
     This highlights all the current search matches in italic:
 
----------------------------------------------
-add-highlighter window dynregex '%reg{/}' 0:i
----------------------------------------------
+----------------------------------------------
+add-highlighter window dynregex '%reg{/}' 0:+i
+----------------------------------------------
 
 == Specs highlighters