diff --git a/actionpack/lib/action_dispatch/http/url.rb b/actionpack/lib/action_dispatch/http/url.rb
index 32234d18abc175a7e8dd1f24f6c7c09be1007b62..12d3b109819a39a15890f239ad5366a0c058dc17 100644
--- a/actionpack/lib/action_dispatch/http/url.rb
+++ b/actionpack/lib/action_dispatch/http/url.rb
@@ -59,9 +59,8 @@ def path_for(options)
 
         private
 
-        def add_params(result, param)
-          params = param.is_a?(Hash) ? param : { params: param }
-
+        def add_params(result, params)
+          params = { params: params } unless params.is_a?(Hash)
           params.reject! { |_,v| v.to_param.nil? }
           result << "?#{params.to_query}" unless params.empty?