diff --git a/lib/Doctrine/ORM/Tools/EntityGenerator.php b/lib/Doctrine/ORM/Tools/EntityGenerator.php
index f55af76b193..c0e7b626749 100644
--- a/lib/Doctrine/ORM/Tools/EntityGenerator.php
+++ b/lib/Doctrine/ORM/Tools/EntityGenerator.php
@@ -462,6 +462,14 @@ private function _parseTokensInEntityFile($src)
 
     private function _hasProperty($property, ClassMetadataInfo $metadata)
     {
+        if ($this->_extendsClass()) {
+            // don't generate property if its already on the base class.
+            $reflClass = new \ReflectionClass($this->_getClassToExtend());
+            if ($reflClass->hasProperty($property)) {
+                return true;
+            }
+        }
+
         return (
             isset($this->_staticReflection[$metadata->name]) &&
             in_array($property, $this->_staticReflection[$metadata->name]['properties'])
@@ -470,6 +478,14 @@ private function _hasProperty($property, ClassMetadataInfo $metadata)
 
     private function _hasMethod($method, ClassMetadataInfo $metadata)
     {
+        if ($this->_extendsClass()) {
+            // don't generate method if its already on the base class.
+            $reflClass = new \ReflectionClass($this->_getClassToExtend());
+            if ($reflClass->hasMethod($method)) {
+                return true;
+            }
+        }
+
         return (
             isset($this->_staticReflection[$metadata->name]) &&
             in_array($method, $this->_staticReflection[$metadata->name]['methods'])