diff --git a/config/routes.rb b/config/routes.rb
index d2adc0cfdb4..66125570f49 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -409,7 +409,7 @@ Discourse::Application.routes.draw do
   end
 
   Discourse.filters.each do |filter|
-    get "#{filter}" => "list##{filter}"
+    get "#{filter}" => "list##{filter}", constraints: { format: /(json|html)/ }
     get "c/:category/l/#{filter}" => "list#category_#{filter}", as: "category_#{filter}"
     get "c/:category/none/l/#{filter}" => "list#category_none_#{filter}", as: "category_none_#{filter}"
     get "c/:parent_category/:category/l/#{filter}" => "list#parent_category_category_#{filter}", as: "parent_category_category_#{filter}"