diff --git a/library/Zend/Db/Adapter/Pdo/Abstract.php b/library/Zend/Db/Adapter/Pdo/Abstract.php
index 0cdd831189..e230b803d4 100644
--- a/library/Zend/Db/Adapter/Pdo/Abstract.php
+++ b/library/Zend/Db/Adapter/Pdo/Abstract.php
@@ -72,7 +72,7 @@ protected function _dsn()
 
         // use all remaining parts in the DSN
         foreach ($dsn as $key => $val) {
-            $dsn[$key] = "$key=$val";
+            $dsn[$key] = trim("$key=$val", ';');
         }
 
         return $this->_pdoType . ':' . implode(';', $dsn);