diff --git a/code/model/Blog.php b/code/model/Blog.php
index 3475e39..04fb83e 100644
--- a/code/model/Blog.php
+++ b/code/model/Blog.php
@@ -709,6 +709,7 @@ class Blog_Controller extends Page_Controller
 
         if ($urlSegment) {
             $filter = URLSegmentFilter::create();
+            $filter->setAllowMultibyte(true);
 
             return Member::get()
                 ->filter('URLSegment', $filter->filter($urlSegment))
diff --git a/tests/Widgets/BlogArchiveWidgetTest.php b/tests/Widgets/BlogArchiveWidgetTest.php
index 6bba2a9..5cdf7e4 100644
--- a/tests/Widgets/BlogArchiveWidgetTest.php
+++ b/tests/Widgets/BlogArchiveWidgetTest.php
@@ -53,7 +53,9 @@ class BlogArchiveWidgetTest extends SapphireTest
             array('Title' => 'August 2017'),
         ), $archive);
 
-        Versioned::reading_stage($original);
+        if ($original) {
+            Versioned::reading_stage($original);
+        }
     }
 
     public function testArchiveYearly()
@@ -91,6 +93,8 @@ class BlogArchiveWidgetTest extends SapphireTest
 
         $this->assertCount(4, $archive, 'Four months are shown in the blog archive list after new post added');
 
-        Versioned::reading_stage($original);
+        if ($original) {
+            Versioned::reading_stage($original);
+        }
     }
 }