diff --git a/core/command/upgrade.php b/core/command/upgrade.php
index 0f1b828ba2..5d4819f6ba 100644
--- a/core/command/upgrade.php
+++ b/core/command/upgrade.php
@@ -30,6 +30,7 @@ namespace OC\Core\Command;
 use OC\Console\TimestampFormatter;
 use OC\Updater;
 use OCP\IConfig;
+use OCP\ILogger;
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
@@ -44,17 +45,19 @@ class Upgrade extends Command {
 	const ERROR_INVALID_ARGUMENTS = 4;
 	const ERROR_FAILURE = 5;
 
-	/**
-	 * @var IConfig
-	 */
+	/** @var IConfig */
 	private $config;
 
+	/** @var ILogger */
+	private $logger;
+
 	/**
 	 * @param IConfig $config
 	 */
-	public function __construct(IConfig $config) {
+	public function __construct(IConfig $config, ILogger $logger) {
 		parent::__construct();
 		$this->config = $config;
+		$this->logger = $logger;
 	}
 
 	protected function configure() {
@@ -126,7 +129,8 @@ class Upgrade extends Command {
 
 			$self = $this;
 			$updater = new Updater(\OC::$server->getHTTPHelper(),
-				$this->config);
+				$this->config,
+				$this->logger);
 
 			$updater->setSimulateStepEnabled($simulateStepEnabled);
 			$updater->setUpdateStepEnabled($updateStepEnabled);
diff --git a/core/register_command.php b/core/register_command.php
index 460e8626e5..4044d2d200 100644
--- a/core/register_command.php
+++ b/core/register_command.php
@@ -94,7 +94,7 @@ if (\OC::$server->getConfig()->getSystemValue('installed', false)) {
 	$application->add(new OC\Core\Command\Maintenance\Repair(new \OC\Repair(\OC\Repair::getRepairSteps()), \OC::$server->getConfig()));
 	$application->add(new OC\Core\Command\Maintenance\SingleUser(\OC::$server->getConfig()));
 
-	$application->add(new OC\Core\Command\Upgrade(\OC::$server->getConfig()));
+	$application->add(new OC\Core\Command\Upgrade(\OC::$server->getConfig(), \OC::$server->getLogger()));
 
 	$application->add(new OC\Core\Command\User\Add(\OC::$server->getUserManager(), \OC::$server->getGroupManager()));
 	$application->add(new OC\Core\Command\User\Delete(\OC::$server->getUserManager()));
diff --git a/lib/private/templatelayout.php b/lib/private/templatelayout.php
index 43c83dea81..7d16823d2a 100644
--- a/lib/private/templatelayout.php
+++ b/lib/private/templatelayout.php
@@ -79,7 +79,7 @@ class OC_TemplateLayout extends OC_Template {
 			if($this->config->getSystemValue('updatechecker', true) === true &&
 				OC_User::isAdminUser(OC_User::getUser())) {
 				$updater = new \OC\Updater(\OC::$server->getHTTPHelper(),
-					\OC::$server->getConfig());
+					\OC::$server->getConfig(), \OC::$server->getLogger());
 				$data = $updater->check();
 
 				if(isset($data['version']) && $data['version'] != '' and $data['version'] !== Array()) {
diff --git a/lib/private/updater.php b/lib/private/updater.php
index 69120427da..70d6886378 100644
--- a/lib/private/updater.php
+++ b/lib/private/updater.php
@@ -198,9 +198,7 @@ class Updater extends BasicEmitter {
 
 		$installedVersion = $this->config->getSystemValue('version', '0.0.0');
 		$currentVersion = implode('.', \OC_Util::getVersion());
-		if ($this->log) {
-			$this->log->debug('starting upgrade from ' . $installedVersion . ' to ' . $currentVersion, array('app' => 'core'));
-		}
+		$this->log->debug('starting upgrade from ' . $installedVersion . ' to ' . $currentVersion, array('app' => 'core'));
 
 		$success = true;
 		try {
diff --git a/tests/lib/updater.php b/tests/lib/updater.php
index 763858acf5..1651fe1759 100644
--- a/tests/lib/updater.php
+++ b/tests/lib/updater.php
@@ -161,7 +161,7 @@ class UpdaterTest extends \Test\TestCase {
 	 * @param bool $result
 	 */
 	public function testIsUpgradePossible($oldVersion, $newVersion, $allowedVersion, $result) {
-		$updater = new Updater($this->httpHelper, $this->config);
+		$updater = new Updater($this->httpHelper, $this->config, $this->logger);
 		$this->assertSame($result, $updater->isUpgradePossible($oldVersion, $newVersion, $allowedVersion));
 	}