diff --git a/src/Monolog/ErrorHandler.php b/src/Monolog/ErrorHandler.php
index 18c783f9..91dd5225 100644
--- a/src/Monolog/ErrorHandler.php
+++ b/src/Monolog/ErrorHandler.php
@@ -57,6 +57,9 @@ class ErrorHandler
      */
     public static function register(LoggerInterface $logger, $errorLevelMap = [], $exceptionLevelMap = [], $fatalLevel = null): self
     {
+        //Forces the autoloader to run for LogLevel. Fixes an autoload issue at compile-time on PHP5.3. See https://github.com/Seldaek/monolog/pull/929
+        class_exists('\\Psr\\Log\\LogLevel', true);
+
         $handler = new static($logger);
         if ($errorLevelMap !== false) {
             $handler->registerErrorHandler($errorLevelMap);
diff --git a/src/Monolog/Handler/RavenHandler.php b/src/Monolog/Handler/RavenHandler.php
index c2283e8d..100866b6 100644
--- a/src/Monolog/Handler/RavenHandler.php
+++ b/src/Monolog/Handler/RavenHandler.php
@@ -218,11 +218,12 @@ class RavenHandler extends AbstractProcessingHandler
      */
     protected function getExtraParameters()
     {
-        return ['checksum', 'release'];
+        return ['checksum', 'release', 'event_id'];
     }
 
     /**
      * @param string $value
+     * @return self
      */
     public function setRelease($value)
     {
diff --git a/tests/Monolog/Handler/RavenHandlerTest.php b/tests/Monolog/Handler/RavenHandlerTest.php
index 23a63ee7..082042f0 100644
--- a/tests/Monolog/Handler/RavenHandlerTest.php
+++ b/tests/Monolog/Handler/RavenHandlerTest.php
@@ -97,11 +97,13 @@ class RavenHandlerTest extends TestCase
 
         $checksum = '098f6bcd4621d373cade4e832627b4f6';
         $release = '05a671c66aefea124cc08b76ea6d30bb';
-        $record = $this->getRecord(Logger::INFO, 'test', ['checksum' => $checksum, 'release' => $release]);
+        $eventId = '31423';
+        $record = $this->getRecord(Logger::INFO, 'test', ['checksum' => $checksum, 'release' => $release, 'event_id' => $eventId]);
         $handler->handle($record);
 
         $this->assertEquals($checksum, $ravenClient->lastData['checksum']);
         $this->assertEquals($release, $ravenClient->lastData['release']);
+        $this->assertEquals($eventId, $ravenClient->lastData['event_id']);
     }
 
     public function testFingerprint()