diff --git a/classes/display/HTMLDisplayHandler.php b/classes/display/HTMLDisplayHandler.php
index 508f86dee..1a3bff6f2 100644
--- a/classes/display/HTMLDisplayHandler.php
+++ b/classes/display/HTMLDisplayHandler.php
@@ -116,7 +116,8 @@ class HTMLDisplayHandler
if(__DEBUG__==3) $start = getMicroTime();
// move in body to the header
- $output = preg_replace_callback('!