diff --git a/core/Db/Adapter.php b/core/Db/Adapter.php
index ca66d53c91448f6230d9a770f2b425907c640353..55283b608d2c45448064d98e02de47c664e96108 100644
--- a/core/Db/Adapter.php
+++ b/core/Db/Adapter.php
@@ -75,7 +75,7 @@ class Adapter
      */
     private static function getAdapterClassName($adapterName)
     {
-         return 'Piwik\Db\Adapter\\' . str_replace(' ', '\\', ucwords(str_replace('_', ' ', strtolower($adapterName))));
+         return 'Piwik\Db\Adapter\\' . str_replace(' ', '\\', ucwords(str_replace(array('_','\\'), ' ', strtolower($adapterName))));
     }
 
     /**