diff --git a/lib/Doctrine/Export.php b/lib/Doctrine/Export.php
index 23772bb08..47614d066 100644
--- a/lib/Doctrine/Export.php
+++ b/lib/Doctrine/Export.php
@@ -1008,6 +1008,7 @@ class Doctrine_Export extends Doctrine_Connection_Module
                 }
             }
         }
+        $sql = array_unique($sql);
         rsort($sql);
 
         return $sql;