diff --git a/Entity/Task.php b/Entity/Task.php
index 6f86a23..8248504 100644
--- a/Entity/Task.php
+++ b/Entity/Task.php
@@ -215,7 +215,12 @@ public function setTaskId($taskId)
      */
     public function getCreatorFullName()
     {
-        return $this->getCreator()->getFullName();
+        $creator = $this->getCreator();
+        if (!$creator) {
+            return '';
+        }
+
+        return $creator->getFullName();
     }
 
     /**
@@ -223,6 +228,11 @@ public function getCreatorFullName()
      */
     public function getChangerFullName()
     {
-        return $this->getChanger()->getFullName();
+        $changer = $this->getChanger();
+        if (!$changer) {
+            return '';
+        }
+
+        return $changer->getFullName();
     }
 }
diff --git a/Tests/Functional/Controller/TaskControllerTest.php b/Tests/Functional/Controller/TaskControllerTest.php
index 421c8db..f0074f9 100644
--- a/Tests/Functional/Controller/TaskControllerTest.php
+++ b/Tests/Functional/Controller/TaskControllerTest.php
@@ -11,6 +11,7 @@
 
 namespace Functional\Controller;
 
+use Sulu\Bundle\AutomationBundle\Entity\Task;
 use Sulu\Bundle\AutomationBundle\Tests\Handler\FirstHandler;
 use Sulu\Bundle\AutomationBundle\Tests\Handler\SecondHandler;
 use Sulu\Bundle\TestBundle\Testing\SuluTestCase;
@@ -334,6 +335,30 @@ public function testGet()
         $this->assertEquals($postData['locale'], $responseData['locale']);
     }
 
+    public function testGetWithoutCreator()
+    {
+        $task = new Task();
+        $task->setEntityClass(Task::class);
+        $task->setEntityId(1);
+        $task->setLocale('de');
+        $task->setHandlerClass(FirstHandler::class);
+        $task->setSchedule(new \DateTime());
+
+        $taskManager = $this->getContainer()->get('sulu_automation.tasks.manager');
+        $taskManager->create($task);
+        $this->getEntityManager()->flush();
+
+        $client = $this->createAuthenticatedClient();
+        $client->request('GET', '/api/tasks/' . $task->getId());
+        $this->assertHttpStatusCode(200, $client->getResponse());
+
+        $responseData = json_decode($client->getResponse()->getContent(), true);
+
+        $this->assertEquals($task->getId(), $responseData['id']);
+        $this->assertEquals('', $responseData['creator']);
+        $this->assertEquals('', $responseData['changer']);
+    }
+
     public function testDelete()
     {
         $postData = $this->testPost();