diff --git a/htdocs/main.inc.php b/htdocs/main.inc.php
index 7cc12bbba03..ce793f0ffad 100644
--- a/htdocs/main.inc.php
+++ b/htdocs/main.inc.php
@@ -969,7 +969,7 @@ function top_htmlhead($head, $title='', $disablejs=0, $disablehead=0, $arrayofjs
             {
             	print '<script type="text/javascript" src="'.DOL_URL_ROOT.'/includes/jquery/plugins/blockUI/jquery.blockUI.js"></script>'."\n";
             	print '<script type="text/javascript">'."\n";
-            	print 'var indicatorBlockUI = \'<img src="'.DOL_URL_ROOT."/theme/".$conf->theme."/img/working2.gif".'">\';'."\n";
+            	print 'var indicatorBlockUI = \''.DOL_URL_ROOT."/theme/".$conf->theme."/img/working2.gif".'\';'."\n";
             	print '</script>'."\n";
             	print '<script type="text/javascript" src="'.DOL_URL_ROOT.'/core/js/blockUI.js"></script>'."\n";
             }