diff --git a/lib/Doctrine/Configurable.php b/lib/Doctrine/Configurable.php
index 9912b28b2..e693e1a74 100644
--- a/lib/Doctrine/Configurable.php
+++ b/lib/Doctrine/Configurable.php
@@ -94,8 +94,12 @@ abstract class Doctrine_Configurable
                 }
                 break;
             case Doctrine::ATTR_CREATE_TABLES:
-                $attribute = Doctrine::ATTR_EXPORT;
-                $value     = Doctrine::EXPORT_ALL;
+                    $attribute = Doctrine::ATTR_EXPORT;
+                if ($value) {
+                    $value = Doctrine::EXPORT_ALL;
+                } else {
+                    $value = Doctrine::EXPORT_NONE;
+                }
                 break;
             case Doctrine::ATTR_ACCESSORS:
                 $accessors = array('none','get','set','both');