diff --git a/actionpack/lib/action_dispatch/routing/mapper.rb b/actionpack/lib/action_dispatch/routing/mapper.rb
index f6d625e7c35022926bdd23eb787d227dff479db1..5e95d8ed39daae44a6b7772a50b7e956d0be3af9 100644
--- a/actionpack/lib/action_dispatch/routing/mapper.rb
+++ b/actionpack/lib/action_dispatch/routing/mapper.rb
@@ -350,7 +350,7 @@ def redirect(*args, &block)
           options = args.last.is_a?(Hash) ? args.pop : {}
 
           path      = args.shift || block
-          path_proc = path.is_a?(Proc) ? path : proc { |params| path % params }
+          path_proc = path.is_a?(Proc) ? path : proc { |params| params.empty? ? path : (path % params) }
           status    = options[:status] || 301
 
           lambda do |env|