diff --git a/lib/Doctrine/ORM/Tools/EntityGenerator.php b/lib/Doctrine/ORM/Tools/EntityGenerator.php
index 29caf1b11..349de0fea 100644
--- a/lib/Doctrine/ORM/Tools/EntityGenerator.php
+++ b/lib/Doctrine/ORM/Tools/EntityGenerator.php
@@ -701,9 +701,9 @@ public function __construct()
      */
     protected function hasProperty($property, ClassMetadataInfo $metadata)
     {
-        if ($this->extendsClass()) {
+        if ($this->extendsClass() || class_exists($metadata->name)) {
             // don't generate property if its already on the base class.
-            $reflClass = new \ReflectionClass($this->getClassToExtend());
+            $reflClass = new \ReflectionClass($this->getClassToExtend() ?: $metadata->name);
             if ($reflClass->hasProperty($property)) {
                 return true;
             }
@@ -723,9 +723,9 @@ public function __construct()
      */
     protected function hasMethod($method, ClassMetadataInfo $metadata)
     {
-        if ($this->extendsClass()) {
+        if ($this->extendsClass() || class_exists($metadata->name)) {
             // don't generate method if its already on the base class.
-            $reflClass = new \ReflectionClass($this->getClassToExtend());
+            $reflClass = new \ReflectionClass($this->getClassToExtend() ?: $metadata->name);
 
             if ($reflClass->hasMethod($method)) {
                 return true;
diff --git a/tests/Doctrine/Tests/Models/DDC1590/DDC1590Entity.php b/tests/Doctrine/Tests/Models/DDC1590/DDC1590Entity.php
new file mode 100644
index 000000000..a4dff26fa
--- /dev/null
+++ b/tests/Doctrine/Tests/Models/DDC1590/DDC1590Entity.php
@@ -0,0 +1,56 @@
+<?php
+
+namespace Doctrine\Tests\Models\DDC1590;
+
+/**
+ * @Entity
+ * @MappedSuperClass
+ */
+abstract class DDC1590Entity
+{
+    /**
+     * @Id
+     * @Column(type="integer")
+     * @GeneratedValue(strategy="AUTO")
+     */
+    protected $id;
+
+    /**
+     * @Column(type="datetime")
+     */
+    protected $created_at;
+
+    /**
+     * Get id
+     *
+     * @return integer
+     */
+    public function getId()
+    {
+        return $this->id;
+    }
+
+    /**
+     * Set createdAt
+     *
+     * @param \DateTime $createdAt
+     *
+     * @return DDC1590User
+     */
+    public function setCreatedAt($createdAt)
+    {
+        $this->created_at = $createdAt;
+
+        return $this;
+    }
+
+    /**
+     * Get createdAt
+     *
+     * @return \DateTime
+     */
+    public function getCreatedAt()
+    {
+        return $this->created_at;
+    }
+}
diff --git a/tests/Doctrine/Tests/Models/DDC1590/DDC1590User.php b/tests/Doctrine/Tests/Models/DDC1590/DDC1590User.php
new file mode 100644
index 000000000..436ab0d54
--- /dev/null
+++ b/tests/Doctrine/Tests/Models/DDC1590/DDC1590User.php
@@ -0,0 +1,18 @@
+<?php
+
+namespace Doctrine\Tests\Models\DDC1590;
+
+use Doctrine\Tests\Models\DDC1590\DDC1590Entity;
+
+/**
+ * @Entity
+ * @Table(name="users")
+ */
+class DDC1590User extends DDC1590Entity
+{
+    /**
+     * @Column(type="string", length=255)
+     */
+    protected $name;
+
+}
diff --git a/tests/Doctrine/Tests/ORM/Tools/EntityGeneratorTest.php b/tests/Doctrine/Tests/ORM/Tools/EntityGeneratorTest.php
index 89eea1baf..347ffab37 100644
--- a/tests/Doctrine/Tests/ORM/Tools/EntityGeneratorTest.php
+++ b/tests/Doctrine/Tests/ORM/Tools/EntityGeneratorTest.php
@@ -2,6 +2,7 @@
 
 namespace Doctrine\Tests\ORM\Tools;
 
+use Doctrine\ORM\Mapping\ClassMetadataFactory;
 use Doctrine\ORM\Tools\SchemaTool,
     Doctrine\ORM\Tools\EntityGenerator,
     Doctrine\ORM\Tools\Export\ClassMetadataExporter,
@@ -454,6 +455,79 @@ class EntityGeneratorTest extends \Doctrine\Tests\OrmTestCase
         $this->assertEquals($value, $entity->{$getter}());
     }
 
+    /**
+     * @group DDC-1590
+     */
+    public function testMethodsAndPropertiesAreNotDuplicatedInChildClasses()
+    {
+        $cmf    = new ClassMetadataFactory();
+        $em     = $this->_getTestEntityManager();
+
+        $cmf->setEntityManager($em);
+
+        $ns     = $this->_namespace;
+        $nsdir  = $this->_tmpDir . '/' . $ns;
+
+        $content = str_replace(
+            'namespace Doctrine\Tests\Models\DDC1590',
+            'namespace ' . $ns,
+            file_get_contents(__DIR__ . '/../../Models/DDC1590/DDC1590User.php')
+        );
+
+        $fname = $nsdir . "/DDC1590User.php";
+        file_put_contents($fname, $content);
+        require $fname;
+
+
+        $metadata = $cmf->getMetadataFor($ns . '\DDC1590User');
+        $this->_generator->writeEntityClass($metadata, $this->_tmpDir);
+
+        // class DDC1590User extends DDC1590Entity { ... }
+        $source = file_get_contents($fname);
+
+        // class _DDC1590User extends DDC1590Entity { ... }
+        $source2    = str_replace('class DDC1590User', 'class _DDC1590User', $source);
+        $fname2     = $nsdir . "/_DDC1590User.php";
+        file_put_contents($fname2, $source2);
+        require $fname2;
+
+        // class __DDC1590User { ... }
+        $source3    = str_replace('class DDC1590User extends DDC1590Entity', 'class __DDC1590User', $source);
+        $fname3     = $nsdir . "/__DDC1590User.php";
+        file_put_contents($fname3, $source3);
+        require $fname3;
+
+
+        // class _DDC1590User extends DDC1590Entity { ... }
+        $rc2 = new \ReflectionClass($ns.'\_DDC1590User');
+
+        $this->assertTrue($rc2->hasProperty('name'));
+        $this->assertTrue($rc2->hasProperty('id'));
+        $this->assertTrue($rc2->hasProperty('created_at'));
+
+        $this->assertTrue($rc2->hasMethod('getName'));
+        $this->assertTrue($rc2->hasMethod('setName'));
+        $this->assertTrue($rc2->hasMethod('getId'));
+        $this->assertFalse($rc2->hasMethod('setId'));
+        $this->assertTrue($rc2->hasMethod('getCreatedAt'));
+        $this->assertTrue($rc2->hasMethod('setCreatedAt'));
+
+
+        // class __DDC1590User { ... }
+        $rc3 = new \ReflectionClass($ns.'\__DDC1590User');
+
+        $this->assertTrue($rc3->hasProperty('name'));
+        $this->assertFalse($rc3->hasProperty('id'));
+        $this->assertFalse($rc3->hasProperty('created_at'));
+
+        $this->assertTrue($rc3->hasMethod('getName'));
+        $this->assertTrue($rc3->hasMethod('setName'));
+        $this->assertFalse($rc3->hasMethod('getId'));
+        $this->assertFalse($rc3->hasMethod('setId'));
+        $this->assertFalse($rc3->hasMethod('getCreatedAt'));
+        $this->assertFalse($rc3->hasMethod('setCreatedAt'));
+    }
+    
     /**
      * @return array
      */