diff --git a/program/include/rcube_db.inc b/program/include/rcube_db.inc
index 18fa8f81a..4c3e9fc62 100644
--- a/program/include/rcube_db.inc
+++ b/program/include/rcube_db.inc
@@ -25,8 +25,7 @@
 /**
  * Obtain the PEAR::DB class that is used for abstraction
  */
-require_once('DB.php');
-
+require_once 'DB.php';
 
 /**
  * Database independent query interface