diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index 18c0558b465..43b01f5ea6b 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -4107,7 +4107,7 @@ function getTitleFieldOfList($name, $thead = 0, $file = "", $field = "", $begin
 
 	if (empty($thead) && $field && empty($disablesortlink))    // If this is a sort field
 	{
-		$options = preg_replace('/sortfield=([a-zA-Z0-9,\s\.]+)/i', '', $moreparam);
+		$options = preg_replace('/sortfield=([a-zA-Z0-9,\s\.]+)/i', '', (is_scalar($moreparam) ? $moreparam : ''));
 		$options = preg_replace('/sortorder=([a-zA-Z0-9,\s\.]+)/i', '', $options);
 		$options = preg_replace('/&+/i', '&', $options);
 		if (!preg_match('/^&/', $options)) $options = '&'.$options;
@@ -4147,7 +4147,7 @@ function getTitleFieldOfList($name, $thead = 0, $file = "", $field = "", $begin
 
 	if (empty($thead) && $field)    // If this is a sort field
 	{
-		$options = preg_replace('/sortfield=([a-zA-Z0-9,\s\.]+)/i', '', $moreparam);
+		$options = preg_replace('/sortfield=([a-zA-Z0-9,\s\.]+)/i', '', (is_scalar($moreparam) ? $moreparam : ''));
 		$options = preg_replace('/sortorder=([a-zA-Z0-9,\s\.]+)/i', '', $options);
 		$options = preg_replace('/&+/i', '&', $options);
 		if (!preg_match('/^&/', $options)) $options = '&'.$options;