diff --git a/library/includes/page_header.php b/library/includes/page_header.php
index b1571f50..20f45cc1 100644
--- a/library/includes/page_header.php
+++ b/library/includes/page_header.php
@@ -52,7 +52,7 @@ if (defined('SHOW_ONLINE') && SHOW_ONLINE)
 }
 
 // Info about new private messages
-$icon_pm = $images['pm_no_new_msg'];
+$icon_pm = !empty($images['pm_no_new_msg']) ? $images['pm_no_new_msg'] : '';
 $pm_info = $lang['NO_NEW_PM'];
 $have_new_pm = $have_unread_pm = 0;
 
@@ -61,7 +61,7 @@ if ($logged_in && empty($gen_simple_header) && !defined('IN_ADMIN'))
 	if ($userdata['user_new_privmsg'])
 	{
 		$have_new_pm = $userdata['user_new_privmsg'];
-		$icon_pm = $images['pm_new_msg'];
+		$icon_pm = !empty($images['pm_new_msg']) ? $images['pm_new_msg'] : '';
 		$pm_info = declension($userdata['user_new_privmsg'], $lang['NEW_PMS_DECLENSION'], $lang['NEW_PMS_FORMAT']);
 
 		if ($userdata['user_last_privmsg'] > $userdata['user_lastvisit'] && defined('IN_PM'))