diff --git a/lib/omniauth/strategies/twitter.rb b/lib/omniauth/strategies/twitter.rb
index 6f83a8d..3d890b6 100644
--- a/lib/omniauth/strategies/twitter.rb
+++ b/lib/omniauth/strategies/twitter.rb
@@ -62,7 +62,17 @@
       end
 
       def callback_url
-        request.params['callback_url'] || super
+        request.params['callback_url']
+      end
+
+      def callback_path
+        params = session['omniauth.params']
+
+        if params.nil? || params['callback_url'].nil?
+          super
+        else
+          URI(params['callback_url']).path
+        end
       end
 
       private
diff --git a/spec/omniauth/strategies/twitter_spec.rb b/spec/omniauth/strategies/twitter_spec.rb
index 3cb0e92..08d726f 100644
--- a/spec/omniauth/strategies/twitter_spec.rb
+++ b/spec/omniauth/strategies/twitter_spec.rb
@@ -127,6 +127,47 @@
 
       it "should switch authorize_path from authenticate to authorize" do
         expect { subject.request_phase }.to change { subject.options.client_options.authorize_path }.from('/oauth/authenticate').to('/oauth/authorize')
+      end
+    end
+
+    context 'with a specified callback_url in the params' do
+      before do
+        params = { 'callback_url' => 'http://foo.dev/auth/twitter/foobar' }
+        allow(subject).to receive(:request) do
+          double('Request', :params => params)
+        end
+        allow(subject).to receive(:session) do
+          double('Session', :[] => { 'callback_url' => params['callback_url'] })
+        end
+        allow(subject).to receive(:old_request_phase) { :whatever }
+      end
+
+      it 'should use the callback_url' do
+        expect(subject.callback_url).to eq 'http://foo.dev/auth/twitter/foobar'
+      end
+
+      it 'should return the correct callback_path' do
+        expect(subject.callback_path).to eq '/auth/twitter/foobar'
+      end
+    end
+
+    context 'with no callback_url set' do
+      before do
+        allow(subject).to receive(:request) do
+          double('Request', :params => {})
+        end
+        allow(subject).to receive(:session) do
+          double('Session', :[] => {})
+        end
+        allow(subject).to receive(:old_request_phase) { :whatever }
+      end
+
+      it 'callback_url should return nil' do
+        expect(subject.callback_url).to be_nil
+      end
+
+      it 'should return the default callback_path value' do
+        expect(subject.callback_path).to eq '/auth/twitter/callback'
       end
     end