diff --git a/src/JMS/Serializer/Metadata/ClassMetadata.php b/src/JMS/Serializer/Metadata/ClassMetadata.php
index 3d76f2563..bd874ba20 100644
--- a/src/JMS/Serializer/Metadata/ClassMetadata.php
+++ b/src/JMS/Serializer/Metadata/ClassMetadata.php
@@ -167,6 +167,12 @@ public function merge(MergeableInterface $object)
             $this->discriminatorDisabled = $object->discriminatorDisabled;
         }
 
+        if ($object->discriminatorMap) {
+            $this->discriminatorFieldName = $object->discriminatorFieldName;
+            $this->discriminatorMap = $object->discriminatorMap;
+            $this->discriminatorBaseClass = $object->discriminatorBaseClass;
+        }
+
         if ($this->discriminatorMap && ! $this->reflection->isAbstract()) {
             if (false === $typeValue = array_search($this->name, $this->discriminatorMap, true)) {
                 throw new \LogicException(sprintf(
diff --git a/tests/JMS/Serializer/Tests/Serializer/Doctrine/IntegrationTest.php b/tests/JMS/Serializer/Tests/Serializer/Doctrine/IntegrationTest.php
index b420db465..c497a56e3 100644
--- a/tests/JMS/Serializer/Tests/Serializer/Doctrine/IntegrationTest.php
+++ b/tests/JMS/Serializer/Tests/Serializer/Doctrine/IntegrationTest.php
@@ -24,6 +24,7 @@
 use JMS\Serializer\Tests\Fixtures\Doctrine\SingleTableInheritance\Student;
 use JMS\Serializer\Tests\Fixtures\Doctrine\SingleTableInheritance\Teacher;
 use JMS\Serializer\Tests\Fixtures\Doctrine\SingleTableInheritance\School;
+use JMS\Serializer\Tests\Fixtures\Doctrine\SingleTableInheritance\Organization;
 
 class IntegrationTest extends \PHPUnit_Framework_TestCase
 {
@@ -38,6 +39,9 @@ public function testDiscriminatorIsInferredForEntityBaseClass()
         $school = new School();
         $json = $this->serializer->serialize($school, 'json');
         $this->assertEquals('{"type":"school"}', $json);
+
+        $deserialized = $this->serializer->deserialize($json, Organization::class, 'json');
+        $this->assertEquals($school, $deserialized);
     }
 
     public function testDiscriminatorIsInferredForGenericBaseClass()
@@ -45,6 +49,9 @@ public function testDiscriminatorIsInferredForGenericBaseClass()
         $student = new Student();
         $json = $this->serializer->serialize($student, 'json');
         $this->assertEquals('{"type":"student"}', $json);
+
+        $deserialized = $this->serializer->deserialize($json, Person::class, 'json');
+        $this->assertEquals($student, $deserialized);
     }
 
     public function testDiscriminatorIsInferredFromDoctrine()