diff --git a/src/Symfony/Component/HttpKernel/DataCollector/Util/ValueExporter.php b/src/Symfony/Component/HttpKernel/DataCollector/Util/ValueExporter.php
index d2f0898605..c9e51cc26f 100644
--- a/src/Symfony/Component/HttpKernel/DataCollector/Util/ValueExporter.php
+++ b/src/Symfony/Component/HttpKernel/DataCollector/Util/ValueExporter.php
@@ -35,6 +35,10 @@ class ValueExporter
             return sprintf('Object(%s)', get_class($value));
         }
 
+        if ($value instanceof \__PHP_Incomplete_Class) {
+            return sprintf('__PHP_Incomplete_Class(%s)', $this->getClassNameFromIncomplete($value));
+        }
+
         if (is_array($value)) {
             if (empty($value)) {
                 return '[]';
@@ -75,4 +79,11 @@ class ValueExporter
 
         return (string) $value;
     }
+
+    private function getClassNameFromIncomplete(\__PHP_Incomplete_Class $value)
+    {
+        $array = new \ArrayObject($value);
+
+        return $array['__PHP_Incomplete_Class_Name'];
+    }
 }
diff --git a/src/Symfony/Component/HttpKernel/Tests/DataCollector/Util/ValueExporterTest.php b/src/Symfony/Component/HttpKernel/Tests/DataCollector/Util/ValueExporterTest.php
index 2f2bb972da..4bfa944f8a 100644
--- a/src/Symfony/Component/HttpKernel/Tests/DataCollector/Util/ValueExporterTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/DataCollector/Util/ValueExporterTest.php
@@ -39,4 +39,12 @@ class ValueExporterTest extends \PHPUnit_Framework_TestCase
         $dateTime = new \DateTimeImmutable('2014-06-10 07:35:40', new \DateTimeZone('UTC'));
         $this->assertSame('Object(DateTimeImmutable) - 2014-06-10T07:35:40+0000', $this->valueExporter->exportValue($dateTime));
     }
+
+    public function testIncompleteClass()
+    {
+        $foo = new \__PHP_Incomplete_Class();
+        $array = new \ArrayObject($foo);
+        $array['__PHP_Incomplete_Class_Name'] = 'AppBundle/Foo';
+        $this->assertSame('__PHP_Incomplete_Class(AppBundle/Foo)', $this->valueExporter->exportValue($foo));
+    }
 }