diff --git a/app/models/api_key_scope.rb b/app/models/api_key_scope.rb
index 0de8dd4ca8b..d2e685d1654 100644
--- a/app/models/api_key_scope.rb
+++ b/app/models/api_key_scope.rb
@@ -101,7 +101,14 @@ class ApiKeyScope < ActiveRecord::Base
       urls = []
 
       if actions.present?
-        Rails.application.routes.routes.each do |route|
+        routes = Rails.application.routes.routes.to_a
+        Rails::Engine.descendants.each do |engine|
+          next if engine == Rails::Application # abstract engine, can't call routes on it
+          next if engine == Discourse::Application # equiv. to Rails.application
+          routes.concat(engine.routes.routes.to_a)
+        end
+
+        routes.each do |route|
           defaults = route.defaults
           action = "#{defaults[:controller].to_s}##{defaults[:action]}"
           path = route.path.spec.to_s.gsub(/\(\.:format\)/, '')