diff --git a/services/web/config/settings.defaults.coffee b/services/web/config/settings.defaults.coffee
index 01743bc69a..da192da698 100644
--- a/services/web/config/settings.defaults.coffee
+++ b/services/web/config/settings.defaults.coffee
@@ -60,7 +60,8 @@ defaultTextExtensions = [
 	'ldf',
 	'rmd',
 	'lua',
-	'gv'
+	'gv',
+	'mf'
 ]
 
 parseTextExtensions = (extensions) ->