diff --git a/actionpack/lib/action_controller/metal/params_wrapper.rb b/actionpack/lib/action_controller/metal/params_wrapper.rb
index 9b27bb8b917613df75bb1f4887cb7f4aeb94a56b..b18be602017a44bb9ce467f2df9314c6430a8478 100644
--- a/actionpack/lib/action_controller/metal/params_wrapper.rb
+++ b/actionpack/lib/action_controller/metal/params_wrapper.rb
@@ -163,7 +163,7 @@ def _set_wrapper_defaults(options, model=nil)
 
         unless options[:only] || options[:except]
           model ||= _default_wrap_model
-          if model.respond_to?(:column_names)
+          if !(model.respond_to?(:abstract_class?) && model.abstract_class?) && model.respond_to?(:column_names)
             options[:only] = model.column_names
           end
         end
diff --git a/actionpack/test/controller/params_wrapper_test.rb b/actionpack/test/controller/params_wrapper_test.rb
index 85464fc780b2834b76037e6eeaef786bd5cb5f54..bed4a6a5533e1bf478aed6610476922df6ad59a6 100644
--- a/actionpack/test/controller/params_wrapper_test.rb
+++ b/actionpack/test/controller/params_wrapper_test.rb
@@ -133,6 +133,7 @@ def test_nested_params
   end
 
   def test_derived_wrapped_keys_from_matching_model
+    User.expects(:respond_to?).with(:abstract_class?).returns(false)
     User.expects(:respond_to?).with(:column_names).returns(true)
     User.expects(:column_names).returns(["username"])
 
@@ -145,6 +146,7 @@ def test_derived_wrapped_keys_from_matching_model
 
   def test_derived_wrapped_keys_from_specified_model
     with_default_wrapper_options do
+      Person.expects(:respond_to?).with(:abstract_class?).returns(false)
       Person.expects(:respond_to?).with(:column_names).returns(true)
       Person.expects(:column_names).returns(["username"])
 
@@ -156,6 +158,17 @@ def test_derived_wrapped_keys_from_specified_model
     end
   end
 
+  def test_not_wrapping_abstract_model
+    User.expects(:respond_to?).with(:abstract_class?).returns(true)
+    User.expects(:abstract_class?).returns(true)
+
+    with_default_wrapper_options do
+      @request.env['CONTENT_TYPE'] = 'application/json'
+      post :parse, { 'username' => 'sikachu', 'title' => 'Developer' }
+      assert_parameters({ 'username' => 'sikachu', 'title' => 'Developer', 'user' => { 'username' => 'sikachu', 'title' => 'Developer' }})
+    end
+  end
+
   private
     def with_default_wrapper_options(&block)
       @controller.class._wrapper_options = {:format => [:json]}
@@ -246,4 +259,4 @@ def with_default_wrapper_options(&block)
     def assert_parameters(expected)
       assert_equal expected, Admin::Users::UsersController.last_parameters
     end
-end
\ No newline at end of file
+end