diff --git a/htdocs/html.form.class.php b/htdocs/html.form.class.php
index 87dc3d2128c..a621a195580 100644
--- a/htdocs/html.form.class.php
+++ b/htdocs/html.form.class.php
@@ -70,6 +70,7 @@ class Form
         $s ='';
         if ($conf->use_javascript && $htmltooltip)
         {
+        	$htmltooltip=ereg_replace("'","\'",$htmltooltip);
             $s.=' onmouseover="showtip(\''.$htmltooltip.'\')"';
             $s.=' onMouseout="hidetip()"';
         }