diff --git a/api/etemplate.php b/api/etemplate.php
index 6648ade760..478d0e5a6f 100644
--- a/api/etemplate.php
+++ b/api/etemplate.php
@@ -14,7 +14,6 @@ use EGroupware\Api;
 
 // add et2- prefix to following widgets/tags
 const ADD_ET2_PREFIX_REGEXP = '#<((/?)([vh]?box|textbox|button))(/?|\s[^>]*)>#m';
-const ADD_ET2_PREFIX_REGEXP = '#<((/?)(box|textbox|button))(/?|\s[^>]*)>#m';
 
 // switch evtl. set output-compression off, as we cant calculate a Content-Length header with transparent compression
 ini_set('zlib.output_compression', 0);