diff --git a/addons/mail/static/src/js/composer.js b/addons/mail/static/src/js/composer.js
index d0b8d2de30d..971c2e99c69 100644
--- a/addons/mail/static/src/js/composer.js
+++ b/addons/mail/static/src/js/composer.js
@@ -23,6 +23,7 @@ var accented_letters_mapping = {
     'oe': 'œ',
     'u': '[ùúûűü]',
     'y': '[ýÿ]',
+    ' ': '[()\\[\\]]',
 };
 
 // The MentionManager allows the Composer to register listeners. For each