diff --git a/core/Command/Log/Manage.php b/core/Command/Log/Manage.php
index 1d65d7ed0d..aeaaca8aa0 100644
--- a/core/Command/Log/Manage.php
+++ b/core/Command/Log/Manage.php
@@ -115,7 +115,7 @@ class Manage extends Command {
 	 * @throws \InvalidArgumentException
 	 */
 	protected function validateBackend($backend) {
-		if (!class_exists('OC_Log_'.$backend)) {
+		if (!class_exists('OC\\Log\\'.ucfirst($backend))) {
 			throw new \InvalidArgumentException('Invalid backend');
 		}
 	}
diff --git a/lib/private/Log.php b/lib/private/Log.php
index d82346bbcf..9248070c06 100644
--- a/lib/private/Log.php
+++ b/lib/private/Log.php
@@ -73,7 +73,7 @@ class Log implements ILogger {
 
 		// FIXME: Add this for backwards compatibility, should be fixed at some point probably
 		if($logger === null) {
-			$this->logger = 'OC_Log_'.ucfirst($this->config->getValue('log_type', 'owncloud'));
+			$this->logger = 'OC\\Log\\'.ucfirst($this->config->getValue('log_type', 'owncloud'));
 			call_user_func(array($this->logger, 'init'));
 		} else {
 			$this->logger = $logger;
diff --git a/lib/private/Server.php b/lib/private/Server.php
index a98ddc36b5..7fe20561af 100644
--- a/lib/private/Server.php
+++ b/lib/private/Server.php
@@ -329,7 +329,7 @@ class Server extends ServerContainer implements IServerContainer {
 		});
 		$this->registerService('Logger', function (Server $c) {
 			$logClass = $c->query('AllConfig')->getSystemValue('log_type', 'owncloud');
-			$logger = 'OC_Log_' . ucfirst($logClass);
+			$logger = 'OC\\Log\\' . ucfirst($logClass);
 			call_user_func(array($logger, 'init'));
 
 			return new Log($logger);
diff --git a/lib/private/log/errorlog.php b/lib/private/log/errorlog.php
index ad3605136d..37498c36ab 100644
--- a/lib/private/log/errorlog.php
+++ b/lib/private/log/errorlog.php
@@ -23,7 +23,9 @@
  * THE SOFTWARE.
  */
 
-class OC_Log_Errorlog {
+namespace OC\Log;
+
+class Errorlog {
 
 
 	/**
diff --git a/lib/private/log/owncloud.php b/lib/private/log/owncloud.php
index 9c106299e4..13997a0d55 100644
--- a/lib/private/log/owncloud.php
+++ b/lib/private/log/owncloud.php
@@ -27,13 +27,15 @@
  *
  */
 
+namespace OC\Log;
+
 /**
  * logging utilities
  *
  * Log is saved at data/owncloud.log (on default)
  */
 
-class OC_Log_Owncloud {
+class Owncloud {
 	static protected $logFile;
 
 	/**
@@ -41,7 +43,7 @@ class OC_Log_Owncloud {
 	 */
 	public static function init() {
 		$systemConfig = \OC::$server->getSystemConfig();
-		$defaultLogFile = $systemConfig->getValue("datadirectory", OC::$SERVERROOT.'/data').'/owncloud.log';
+		$defaultLogFile = $systemConfig->getValue("datadirectory", \OC::$SERVERROOT.'/data').'/owncloud.log';
 		self::$logFile = $systemConfig->getValue("logfile", $defaultLogFile);
 
 		/**
@@ -72,13 +74,13 @@ class OC_Log_Owncloud {
 		$format = $config->getValue('logdateformat', 'c');
 		$logTimeZone = $config->getValue( "logtimezone", 'UTC' );
 		try {
-			$timezone = new DateTimeZone($logTimeZone);
-		} catch (Exception $e) {
-			$timezone = new DateTimeZone('UTC');
+			$timezone = new \DateTimeZone($logTimeZone);
+		} catch (\Exception $e) {
+			$timezone = new \DateTimeZone('UTC');
 		}
-		$time = DateTime::createFromFormat("U.u", number_format(microtime(true), 4, ".", ""));
+		$time = \DateTime::createFromFormat("U.u", number_format(microtime(true), 4, ".", ""));
 		if ($time === false) {
-			$time = new DateTime(null, $timezone);
+			$time = new \DateTime(null, $timezone);
 		} else {
 			// apply timezone if $time is created from UNIX timestamp
 			$time->setTimezone($timezone);
diff --git a/lib/private/log/syslog.php b/lib/private/log/syslog.php
index 96cf463d04..115103f26d 100644
--- a/lib/private/log/syslog.php
+++ b/lib/private/log/syslog.php
@@ -21,7 +21,9 @@
  *
  */
 
-class OC_Log_Syslog {
+namespace OC\Log;
+
+class Syslog {
 	static protected $levels = array(
 		\OCP\Util::DEBUG => LOG_DEBUG,
 		\OCP\Util::INFO => LOG_INFO,
diff --git a/settings/Controller/LogSettingsController.php b/settings/Controller/LogSettingsController.php
index c0c9ee04ca..70a2b75235 100644
--- a/settings/Controller/LogSettingsController.php
+++ b/settings/Controller/LogSettingsController.php
@@ -102,7 +102,7 @@ class LogSettingsController extends Controller {
 	 * @return StreamResponse
 	 */
 	public function download() {
-		$resp = new StreamResponse(\OC_Log_Owncloud::getLogFilePath());
+		$resp = new StreamResponse(\OC\Log\Owncloud::getLogFilePath());
 		$resp->addHeader('Content-Disposition', 'attachment; filename="owncloud.log"');
 		return $resp;
 	}
diff --git a/tests/lib/log/owncloud.php b/tests/lib/log/owncloud.php
index adecc49768..e19063a83f 100644
--- a/tests/lib/log/owncloud.php
+++ b/tests/lib/log/owncloud.php
@@ -15,12 +15,17 @@
  * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+namespace Test\Log;
+
+use OC\Log\Owncloud;
+use Test\TestCase;
+
 /**
- * Class Test_Log_Owncloud
+ * Class OwncloudTest
  *
  * @group DB
  */
-class Test_Log_Owncloud extends Test\TestCase
+class OwncloudTest extends TestCase
 {
 	private $restore_logfile;
 	private $restore_logdateformat;
@@ -32,7 +37,7 @@ class Test_Log_Owncloud extends Test\TestCase
 		$this->restore_logdateformat = $config->getSystemValue('logdateformat');
 		
 		$config->setSystemValue("logfile", $config->getSystemValue('datadirectory') . "/logtest");
-		OC_Log_Owncloud::init();
+		Owncloud::init();
 	}
 	protected function tearDown() {
 		$config = \OC::$server->getConfig();
@@ -46,7 +51,7 @@ class Test_Log_Owncloud extends Test\TestCase
 		} else {
 			$config->deleteSystemValue("restore_logdateformat");
 		}		
-		OC_Log_Owncloud::init();
+		Owncloud::init();
 		parent::tearDown();
 	}
 	
@@ -57,7 +62,7 @@ class Test_Log_Owncloud extends Test\TestCase
 
 		# set format & write log line
 		$config->setSystemValue('logdateformat', 'u');
-		OC_Log_Owncloud::write('test', 'message', \OCP\Util::ERROR);
+		Owncloud::write('test', 'message', \OCP\Util::ERROR);
 		
 		# read log line
 		$handle = @fopen($config->getSystemValue('logfile'), 'r');