diff --git a/theme/readme.txt b/theme/readme.txt
index 335801385d..4998b3c988 100644
--- a/theme/readme.txt
+++ b/theme/readme.txt
@@ -31,3 +31,6 @@ cp -r ./default ./mytheme
 nano ./mytheme/css/display.css
 
 3. Search and replace a colour or a path to the background image of your choice.
+
+4. Set /config.php to load 'mytheme':
+$config['site']['theme'] = 'mytheme';