diff --git a/inc/inc.ClassExtensionMgr.php b/inc/inc.ClassExtensionMgr.php
index 66f8f4217..fa5cb7c70 100644
--- a/inc/inc.ClassExtensionMgr.php
+++ b/inc/inc.ClassExtensionMgr.php
@@ -14,6 +14,8 @@
  * @version    Release: @package_version@
  */
 
+namespace Seeddms\Seeddms;
+
 /**
  * Class to represent an extension manager
  *
@@ -25,7 +27,7 @@
  * @copyright  2011 Uwe Steinmann
  * @version    Release: @package_version@
  */
-class SeedDMS_Extension_Mgr {
+class ExtensionMgr {
 	/**
 	 * @var string $extdir directory where extensions are located
 	 * @access protected
@@ -440,7 +442,7 @@ $EXT_CONF = '.var_export($EXT_CONF, true).';');
 				foreach($extconf['constraints']['depends'] as $dkey=>$dval) {
 					switch($dkey) {
 					case 'seeddms':
-						$version = new SeedDMS_Version;
+						$version = new Version;
 						if(is_array($dval)) {
 							$fullfill = false;
 							foreach($dval as $ddval) {
@@ -725,3 +727,5 @@ $EXT_CONF = '.var_export($EXT_CONF, true).';');
 		return $this->errmsgs;
 	} /* }}} */
 }
+
+class_alias('Seeddms\Seeddms\ExtensionMgr', 'SeedDMS_Extension_Mgr');