diff --git a/include/functions_html.inc.php b/include/functions_html.inc.php
index b8620f80a..75f324537 100644
--- a/include/functions_html.inc.php
+++ b/include/functions_html.inc.php
@@ -267,7 +267,7 @@ function access_denied()
 
   $access_denied_html = 
   '<meta http-equiv="Content-Type" content="text/html; charset=utf-8">'.
-  '<div style="display: flex; justify-content: center;align-items: center;height: 100vh;margin: 0;color: #3C3C3C;font-family: \'Open Sans\';font-size: 20px;font-style: normal;font-weight: 600;line-height: normal;">'.
+  '<div style="display: flex; justify-content: center;align-items: center;height: 100vh;margin: 0;color: #3C3C3C;font-family: \'Open Sans\', sans-serif;font-size: 20px;font-style: normal;font-weight: 600;line-height: normal;">'.
   '<div style="text-align:center;">'.
   '<img src="themes/default/icon/warning-triangle.svg" alt="warning-triangle" >'.
   '<p style="max-width: 400px; margin-top 20px;">'.l10n('You are not authorized to access the requested page').'</p>';