diff --git a/includes/skins/SkinUserPageHelper.php b/includes/skins/SkinUserPageHelper.php
index 7da2360..30f1d23 100644
--- a/includes/skins/SkinUserPageHelper.php
+++ b/includes/skins/SkinUserPageHelper.php
@@ -25,7 +25,7 @@ use User;
 
 class SkinUserPageHelper {
 	/**
-	 * @var Title
+	 * @var Title|null
 	 */
 	private $title;
 	/**
@@ -39,9 +39,9 @@ class SkinUserPageHelper {
 	private $pageUser;
 
 	/**
-	 * @param Title $title
+	 * @param Title|null $title
 	 */
-	public function __construct( Title $title ) {
+	public function __construct( Title $title = null ) {
 		$this->title = $title;
 	}
 
@@ -51,7 +51,8 @@ class SkinUserPageHelper {
 	 */
 	private function fetchData() {
 		if ( $this->fetchedData === false ) {
-			if ( $this->title->inNamespace( NS_USER ) && !$this->title->isSubpage() ) {
+			if ( $this->title && $this->title->inNamespace( NS_USER ) && !$this->title->isSubpage()
+			) {
 				$this->pageUser = $this->buildPageUserObject( $this->title );
 			}
 			$this->fetchedData = true;
diff --git a/tests/phpunit/skins/SkinUserPageHelperTest.php b/tests/phpunit/skins/SkinUserPageHelperTest.php
index 778085c..6fd584c 100644
--- a/tests/phpunit/skins/SkinUserPageHelperTest.php
+++ b/tests/phpunit/skins/SkinUserPageHelperTest.php
@@ -24,6 +24,19 @@ class SkinUserPageHelperTest extends MediaWikiTestCase {
 		$this->assertEquals( false, $helper->isUserPage() );
 	}
 
+	/**
+	 * @covers ::isUserPage
+	 * @covers ::fetchData
+	 * @covers ::__construct
+	 */
+	public function testTitleIsNull() {
+		$title = null;
+
+		$helper = new SkinUserPageHelper( $title );
+		$this->assertEquals( null, $helper->getPageUser() );
+		$this->assertEquals( false, $helper->isUserPage() );
+	}
+
 	/**
 	 * @covers ::isUserPage
 	 * @covers ::fetchData