diff --git a/app/controllers/auth/sessions_controller.rb b/app/controllers/auth/sessions_controller.rb
index eb8ac38da9..5f9f133659 100644
--- a/app/controllers/auth/sessions_controller.rb
+++ b/app/controllers/auth/sessions_controller.rb
@@ -174,7 +174,7 @@ class Auth::SessionsController < Devise::SessionsController
   end
 
   def disable_custom_css?
-    user_params[:disable_css].present? && user_params[:disable_css] != '0'
+    user_params[:disable_css].present? && user_params[:disable_css] == '1'
   end
 
   def disable_custom_css!(user)