diff --git a/app/views/layouts/application.html.haml b/app/views/layouts/application.html.haml
index 1b5e7574..a2d60e2c 100644
--- a/app/views/layouts/application.html.haml
+++ b/app/views/layouts/application.html.haml
@@ -21,7 +21,7 @@
       = javascript_include_tag "//cdn.transifex.com/live.js"
 
     = yield(:head)
-    - if @conference && @conference.custom_css?
+    - if @conference && @conference.custom_css
       %style{type: 'text/css'}
         = @conference.custom_css