diff --git a/lib/Doctrine/ORM/AbstractQuery.php b/lib/Doctrine/ORM/AbstractQuery.php
index 3ba0dee26..0e66e147f 100644
--- a/lib/Doctrine/ORM/AbstractQuery.php
+++ b/lib/Doctrine/ORM/AbstractQuery.php
@@ -19,10 +19,12 @@
 
 namespace Doctrine\ORM;
 
+use Doctrine\Common\Persistence\Mapping\MappingException;
 use Doctrine\Common\Util\ClassUtils;
 use Doctrine\Common\Collections\Collection;
 use Doctrine\Common\Collections\ArrayCollection;
 
+use Doctrine\ORM\Mapping\MappingException as ORMMappingException;
 use Doctrine\ORM\Query\Parameter;
 use Doctrine\ORM\Cache\QueryCacheKey;
 use Doctrine\DBAL\Cache\QueryCacheProfile;
@@ -410,16 +412,24 @@ abstract class AbstractQuery
             return $value;
         }
 
-        if (is_object($value) && $this->_em->getMetadataFactory()->hasMetadataFor(ClassUtils::getClass($value))) {
+        if ($value instanceof Mapping\ClassMetadata) {
+            return $value->name;
+        }
+
+        if (! is_object($value)) {
+            return $value;
+        }
+
+        try {
             $value = $this->_em->getUnitOfWork()->getSingleIdentifierValue($value);
 
             if ($value === null) {
                 throw ORMInvalidArgumentException::invalidIdentifierBindingEntity();
             }
-        }
-
-        if ($value instanceof Mapping\ClassMetadata) {
-            return $value->name;
+        } catch (MappingException | ORMMappingException $e) {
+            // Silence any mapping exceptions. These can occur if the object in
+            // question is not a mapped entity, in which case we just don't do
+            // any preparation on the value.
         }
 
         return $value;
diff --git a/tests/Doctrine/Tests/ORM/Query/QueryTest.php b/tests/Doctrine/Tests/ORM/Query/QueryTest.php
index 8cceb6c50..8a3caf66f 100644
--- a/tests/Doctrine/Tests/ORM/Query/QueryTest.php
+++ b/tests/Doctrine/Tests/ORM/Query/QueryTest.php
@@ -189,6 +189,25 @@ class QueryTest extends OrmTestCase
         );
     }
 
+    public function testProcessParameterValueObject() : void
+    {
+        $query = $this->_em->createQuery('SELECT a FROM Doctrine\Tests\Models\CMS\CmsAddress a WHERE a.user = :user');
+        $user = new CmsUser();
+        $user->id = 12345;
+
+        self::assertSame(
+            12345,
+            $query->processParameterValue($user)
+        );
+    }
+
+    public function testProcessParameterValueNull() : void
+    {
+        $query = $this->_em->createQuery('SELECT a FROM Doctrine\Tests\Models\CMS\CmsAddress a WHERE a.user = :user');
+
+        self::assertNull($query->processParameterValue(null));
+    }
+
     public function testDefaultQueryHints()
     {
         $config = $this->_em->getConfiguration();