diff --git a/lib/devise/mapping.rb b/lib/devise/mapping.rb
index 863d562c..677fe6d1 100644
--- a/lib/devise/mapping.rb
+++ b/lib/devise/mapping.rb
@@ -67,6 +67,9 @@ module Devise
       @constraints = Hash.new { |h,k| h[k] = k.to_s }
       @constraints.merge!(options[:constraints] || {})
 
+      @defaults = Hash.new { |h,k| h[k] = k.to_s }
+      @defaults.merge!(options[:defaults] || {})
+
       @sign_out_via = options[:sign_out_via] || Devise.sign_out_via
     end
 
@@ -104,6 +107,10 @@ module Devise
       @constraints
     end
     
+    def defaults
+      @defaults
+    end
+    
     # Create magic predicates for verifying what module is activated by this map.
     # Example:
     #
diff --git a/lib/devise/rails/routes.rb b/lib/devise/rails/routes.rb
index a55df494..92f153c0 100644
--- a/lib/devise/rails/routes.rb
+++ b/lib/devise/rails/routes.rb
@@ -160,6 +160,7 @@ module ActionDispatch::Routing
       options[:path_prefix] ||= @scope[:path]   if @scope[:path].present?
       options[:path_names]    = (@scope[:path_names] || {}).merge(options[:path_names] || {})
       options[:constraints]   = (@scope[:constraints] || {}).merge(options[:constraints] || {})
+      options[:defaults]      = (@scope[:defaults] || {}).merge(options[:defaults] || {})
 
       resources.map!(&:to_sym)
 
@@ -186,7 +187,7 @@ module ActionDispatch::Routing
 
         devise_scope mapping.name do
           yield if block_given?
-          with_devise_exclusive_scope mapping.fullpath, mapping.name, mapping.constraints do
+          with_devise_exclusive_scope mapping.fullpath, mapping.name, mapping.constraints, mapping.defaults do
             routes.each { |mod| send("devise_#{mod}", mapping, mapping.controllers) }
           end
         end
@@ -331,12 +332,12 @@ module ActionDispatch::Routing
         @scope[:path] = path
       end
 
-      def with_devise_exclusive_scope(new_path, new_as, new_constraints) #:nodoc:
-        old_as, old_path, old_module, old_constraints = @scope[:as], @scope[:path], @scope[:module], @scope[:constraints]
-        @scope[:as], @scope[:path], @scope[:module], @scope[:constraints] = new_as, new_path, nil, new_constraints
+      def with_devise_exclusive_scope(new_path, new_as, new_constraints, new_defaults) #:nodoc:
+        old_as, old_path, old_module, old_constraints, old_defaults = @scope[:as], @scope[:path], @scope[:module], @scope[:constraints], @scope[:defaults]
+        @scope[:as], @scope[:path], @scope[:module], @scope[:constraints], @scope[:defaults] = new_as, new_path, nil, new_constraints, new_defaults
         yield
       ensure
-        @scope[:as], @scope[:path], @scope[:module], @scope[:constraints] = old_as, old_path, old_module, old_constraints
+        @scope[:as], @scope[:path], @scope[:module], @scope[:constraints], @scope[:defaults] = old_as, old_path, old_module, old_constraints, old_defaults
       end
 
       def raise_no_devise_method_error!(klass) #:nodoc: