diff --git a/doctrine-mapping.xsd b/doctrine-mapping.xsd
index 227af4403..0d3704a7e 100644
--- a/doctrine-mapping.xsd
+++ b/doctrine-mapping.xsd
@@ -203,9 +203,10 @@
       <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:sequence>
     <xs:attribute name="name" type="xs:NMTOKEN" use="required" />
-    <xs:attribute name="type" type="xs:NMTOKEN" use="required" />
+    <xs:attribute name="type" type="xs:NMTOKEN"/>
     <xs:attribute name="field-name" type="xs:NMTOKEN" />
     <xs:attribute name="length" type="xs:NMTOKEN" />
+    <xs:attribute name="column-definition" type="xs:string" />
     <xs:anyAttribute namespace="##other"/>
   </xs:complexType>
   
@@ -278,6 +279,7 @@
     <xs:attribute name="type" type="xs:NMTOKEN" />
     <xs:attribute name="column" type="xs:NMTOKEN" />
     <xs:attribute name="association-key" type="xs:boolean" default="false" />
+    <xs:attribute name="column-definition" type="xs:string" />
     <xs:anyAttribute namespace="##other"/>
   </xs:complexType>
 
diff --git a/lib/Doctrine/ORM/Mapping/DiscriminatorColumn.php b/lib/Doctrine/ORM/Mapping/DiscriminatorColumn.php
index aec011538..0a9d6e9d5 100644
--- a/lib/Doctrine/ORM/Mapping/DiscriminatorColumn.php
+++ b/lib/Doctrine/ORM/Mapping/DiscriminatorColumn.php
@@ -33,4 +33,6 @@ final class DiscriminatorColumn implements Annotation
     public $length;
     /** @var mixed */
     public $fieldName; // field name used in non-object hydration (array/scalar)
+    /** @var string */
+    public $columnDefinition;
 }
diff --git a/lib/Doctrine/ORM/Mapping/Driver/AnnotationDriver.php b/lib/Doctrine/ORM/Mapping/Driver/AnnotationDriver.php
index e95d32e94..93e8473a4 100644
--- a/lib/Doctrine/ORM/Mapping/Driver/AnnotationDriver.php
+++ b/lib/Doctrine/ORM/Mapping/Driver/AnnotationDriver.php
@@ -228,7 +228,8 @@ class AnnotationDriver implements Driver
                     $metadata->setDiscriminatorColumn(array(
                         'name' => $discrColumnAnnot->name,
                         'type' => $discrColumnAnnot->type,
-                        'length' => $discrColumnAnnot->length
+                        'length' => $discrColumnAnnot->length,
+                        'columnDefinition'    => $discrColumnAnnot->columnDefinition
                     ));
                 } else {
                     $metadata->setDiscriminatorColumn(array('name' => 'dtype', 'type' => 'string', 'length' => 255));
diff --git a/lib/Doctrine/ORM/Mapping/Driver/XmlDriver.php b/lib/Doctrine/ORM/Mapping/Driver/XmlDriver.php
index a528346e6..b62df3893 100644
--- a/lib/Doctrine/ORM/Mapping/Driver/XmlDriver.php
+++ b/lib/Doctrine/ORM/Mapping/Driver/XmlDriver.php
@@ -99,9 +99,10 @@ class XmlDriver extends AbstractFileDriver
                 if (isset($xmlRoot->{'discriminator-column'})) {
                     $discrColumn = $xmlRoot->{'discriminator-column'};
                     $metadata->setDiscriminatorColumn(array(
-                        'name' => (string)$discrColumn['name'],
-                        'type' => (string)$discrColumn['type'],
-                        'length' => (string)$discrColumn['length']
+                        'name' => isset($discrColumn['name']) ? (string)$discrColumn['name'] : null,
+                        'type' => isset($discrColumn['type']) ? (string)$discrColumn['type'] : null,
+                        'length' => isset($discrColumn['length']) ? (string)$discrColumn['length'] : null,
+                        'columnDefinition' => isset($discrColumn['column-definition']) ? (string)$discrColumn['column-definition'] : null
                     ));
                 } else {
                     $metadata->setDiscriminatorColumn(array('name' => 'dtype', 'type' => 'string', 'length' => 255));
diff --git a/lib/Doctrine/ORM/Mapping/Driver/YamlDriver.php b/lib/Doctrine/ORM/Mapping/Driver/YamlDriver.php
index 0106f3aba..ef0eff6ec 100644
--- a/lib/Doctrine/ORM/Mapping/Driver/YamlDriver.php
+++ b/lib/Doctrine/ORM/Mapping/Driver/YamlDriver.php
@@ -96,9 +96,10 @@ class YamlDriver extends AbstractFileDriver
                 if (isset($element['discriminatorColumn'])) {
                     $discrColumn = $element['discriminatorColumn'];
                     $metadata->setDiscriminatorColumn(array(
-                        'name' => $discrColumn['name'],
-                        'type' => $discrColumn['type'],
-                        'length' => $discrColumn['length']
+                        'name' => isset($discrColumn['name']) ? (string)$discrColumn['name'] : null,
+                        'type' => isset($discrColumn['type']) ? (string)$discrColumn['type'] : null,
+                        'length' => isset($discrColumn['length']) ? (string)$discrColumn['length'] : null,
+                        'columnDefinition' => isset($discrColumn['columnDefinition']) ? (string)$discrColumn['columnDefinition'] : null
                     ));
                 } else {
                     $metadata->setDiscriminatorColumn(array('name' => 'dtype', 'type' => 'string', 'length' => 255));
diff --git a/lib/Doctrine/ORM/Tools/SchemaTool.php b/lib/Doctrine/ORM/Tools/SchemaTool.php
index 85e50b2b0..027285c27 100644
--- a/lib/Doctrine/ORM/Tools/SchemaTool.php
+++ b/lib/Doctrine/ORM/Tools/SchemaTool.php
@@ -288,11 +288,16 @@ class SchemaTool
             $discrColumn['length'] = 255;
         }
 
-        $table->addColumn(
-            $discrColumn['name'],
-            $discrColumn['type'],
-            array('length' => $discrColumn['length'], 'notnull' => true)
+        $options = array(
+            'length'    => isset($discrColumn['length']) ? $discrColumn['length'] : null,
+            'notnull'   => true
         );
+
+        if (isset($discrColumn['columnDefinition'])) {
+            $options['columnDefinition'] = $discrColumn['columnDefinition'];
+        }
+
+        $table->addColumn($discrColumn['name'], $discrColumn['type'], $options);
     }
 
     /**
diff --git a/tests/Doctrine/Tests/ORM/Mapping/AbstractMappingDriverTest.php b/tests/Doctrine/Tests/ORM/Mapping/AbstractMappingDriverTest.php
index 369c8fdeb..4b2da0a70 100644
--- a/tests/Doctrine/Tests/ORM/Mapping/AbstractMappingDriverTest.php
+++ b/tests/Doctrine/Tests/ORM/Mapping/AbstractMappingDriverTest.php
@@ -434,6 +434,21 @@ abstract class AbstractMappingDriverTest extends \Doctrine\Tests\OrmTestCase
         $this->assertEquals('NAME', $class->columnNames['name']);
         $this->assertEquals('DDC1476ENTITY_WITH_DEFAULT_FIELD_TYPE', $class->table['name']);
     }
+
+    /**
+     * @group DDC-807
+     * @group DDC-553
+     */
+    public function testDiscriminatorColumnDefinition()
+    {
+        $class = $this->createClassMetadata(__NAMESPACE__ . '\DDC807Entity');
+
+        $this->assertArrayHasKey('columnDefinition', $class->discriminatorColumn);
+        $this->assertArrayHasKey('name', $class->discriminatorColumn);
+
+        $this->assertEquals("ENUM('ONE','TWO')", $class->discriminatorColumn['columnDefinition']);
+        $this->assertEquals("dtype", $class->discriminatorColumn['name']);
+    }
 }
 
 /**
@@ -724,6 +739,42 @@ class DDC1170Entity
 
 }
 
+/**
+ * @Entity
+ * @InheritanceType("SINGLE_TABLE")
+ * @DiscriminatorMap({"ONE" = "DDC807SubClasse1", "TWO" = "DDC807SubClasse2"})
+ * @DiscriminatorColumn(name = "dtype", columnDefinition="ENUM('ONE','TWO')")
+ */
+class DDC807Entity
+{
+    /**
+     * @Id
+     * @Column(type="integer")
+     * @GeneratedValue(strategy="NONE")
+     **/
+   public $id;
+   
+   public static function loadMetadata(ClassMetadataInfo $metadata)
+    {
+         $metadata->mapField(array(
+           'id'                 => true,
+           'fieldName'          => 'id',
+        ));
+
+        $metadata->setDiscriminatorColumn(array(
+            'name'              => "dtype",
+            'type'              => "string",
+            'columnDefinition'  => "ENUM('ONE','TWO')"
+        ));
+
+        $metadata->setIdGeneratorType(ClassMetadataInfo::GENERATOR_TYPE_NONE);
+    }
+}
+
+
+class DDC807SubClasse1 {}
+class DDC807SubClasse2 {}
+
 class Address {}
 class Phonenumber {}
 class Group {}
diff --git a/tests/Doctrine/Tests/ORM/Mapping/php/Doctrine.Tests.ORM.Mapping.DDC807Entity.php b/tests/Doctrine/Tests/ORM/Mapping/php/Doctrine.Tests.ORM.Mapping.DDC807Entity.php
new file mode 100644
index 000000000..1682d7a0d
--- /dev/null
+++ b/tests/Doctrine/Tests/ORM/Mapping/php/Doctrine.Tests.ORM.Mapping.DDC807Entity.php
@@ -0,0 +1,15 @@
+<?php
+
+use Doctrine\ORM\Mapping\ClassMetadataInfo;
+
+$metadata->mapField(array(
+   'id'                 => true,
+   'fieldName'          => 'id',
+));
+
+$metadata->setDiscriminatorColumn(array(
+    'name'              => "dtype",
+    'columnDefinition'  => "ENUM('ONE','TWO')"
+));
+
+$metadata->setIdGeneratorType(ClassMetadataInfo::GENERATOR_TYPE_NONE);
\ No newline at end of file
diff --git a/tests/Doctrine/Tests/ORM/Mapping/xml/Doctrine.Tests.ORM.Mapping.DDC807Entity.dcm.xml b/tests/Doctrine/Tests/ORM/Mapping/xml/Doctrine.Tests.ORM.Mapping.DDC807Entity.dcm.xml
new file mode 100644
index 000000000..3dc9135c5
--- /dev/null
+++ b/tests/Doctrine/Tests/ORM/Mapping/xml/Doctrine.Tests.ORM.Mapping.DDC807Entity.dcm.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<doctrine-mapping xmlns="http://doctrine-project.org/schemas/orm/doctrine-mapping"
+      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+      xsi:schemaLocation="http://doctrine-project.org/schemas/orm/doctrine-mapping
+                          http://www.doctrine-project.org/schemas/orm/doctrine-mapping.xsd">
+                              
+    <entity name="Doctrine\Tests\ORM\Mapping\DDC807Entity" inheritance-type="SINGLE_TABLE">
+        <id name="id">
+            <generator strategy="NONE"/>
+        </id>
+
+        <discriminator-column name="dtype" column-definition="ENUM('ONE','TWO')"/>
+        
+        <discriminator-map>
+            <discriminator-mapping value="ONE" class="DDC807SubClasse1" />
+            <discriminator-mapping value="TWO" class="DDC807SubClasse1" />
+        </discriminator-map>
+    </entity>
+        
+</doctrine-mapping>
\ No newline at end of file
diff --git a/tests/Doctrine/Tests/ORM/Mapping/yaml/Doctrine.Tests.ORM.Mapping.DDC807Entity.dcm.yml b/tests/Doctrine/Tests/ORM/Mapping/yaml/Doctrine.Tests.ORM.Mapping.DDC807Entity.dcm.yml
new file mode 100644
index 000000000..20db3c328
--- /dev/null
+++ b/tests/Doctrine/Tests/ORM/Mapping/yaml/Doctrine.Tests.ORM.Mapping.DDC807Entity.dcm.yml
@@ -0,0 +1,13 @@
+Doctrine\Tests\ORM\Mapping\DDC807Entity:
+  type: entity
+  inheritanceType: SINGLE_TABLE
+  discriminatorMap:
+    ONE: DDC807SubClasse1
+    TWO: DDC807SubClasse2
+  discriminatorColumn:
+    name: dtype
+    columnDefinition: ENUM('ONE','TWO')
+  id:
+    id: 
+      generator:
+        strategy: NONE
\ No newline at end of file