diff --git a/IPython/frontend/html/notebook/handlers.py b/IPython/frontend/html/notebook/handlers.py
index a1f287e..aa07bb8 100644
--- a/IPython/frontend/html/notebook/handlers.py
+++ b/IPython/frontend/html/notebook/handlers.py
@@ -364,9 +364,9 @@ class KernelActionHandler(AuthenticatedHandler):
             km.interrupt_kernel(kernel_id)
             self.set_status(204)
         if action == 'restart':
-            new_kernel_id = km.restart_kernel(kernel_id)
-            data = {'ws_url':self.ws_url,'kernel_id':new_kernel_id}
-            self.set_header('Location', '/'+new_kernel_id)
+            km.restart_kernel(kernel_id)
+            data = {'ws_url':self.ws_url, 'kernel_id':kernel_id}
+            self.set_header('Location', '/'+kernel_id)
             self.write(jsonapi.dumps(data))
         self.finish()
 
diff --git a/IPython/frontend/html/notebook/kernelmanager.py b/IPython/frontend/html/notebook/kernelmanager.py
index 69b3ea8..c456659 100644
--- a/IPython/frontend/html/notebook/kernelmanager.py
+++ b/IPython/frontend/html/notebook/kernelmanager.py
@@ -350,7 +350,6 @@ class MappingKernelManager(MultiKernelManager):
         self._check_kernel_id(kernel_id)
         super(MappingKernelManager, self).restart_kernel(kernel_id)
         self.log.info("Kernel restarted: %s" % kernel_id)
-        return kernel_id
 
     def create_iopub_stream(self, kernel_id):
         """Create a new iopub stream."""
diff --git a/IPython/frontend/html/notebook/tests/test_kernelsession.py b/IPython/frontend/html/notebook/tests/test_kernelsession.py
index fbe790c..50d2c70 100644
--- a/IPython/frontend/html/notebook/tests/test_kernelsession.py
+++ b/IPython/frontend/html/notebook/tests/test_kernelsession.py
@@ -12,8 +12,8 @@ class TestKernelManager(TestCase):
         self.assertTrue(kid in km)
         self.assertTrue(kid in km.list_kernel_ids())
         self.assertEqual(len(km),1)
-        new_kid = km.restart_kernel(kid)
-        self.assertTrue(kid, new_kid)
+        km.restart_kernel(kid)
+        self.assertTrue(kid in km.list_kernel_ids())
         km.interrupt_kernel(kid)
         km.kill_kernel(kid)
         self.assertTrue(not kid in km)