diff --git a/lib/plugins/usermanager/admin.php b/lib/plugins/usermanager/admin.php
index 3dba5a86edeeab744080e9750101aa83f78b040b..8638692a1eef9ee3e2624bcf8f3e7e11a2f5f105 100644
--- a/lib/plugins/usermanager/admin.php
+++ b/lib/plugins/usermanager/admin.php
@@ -153,7 +153,12 @@ class admin_plugin_usermanager extends DokuWiki_Admin_Plugin {
         if ($this->_user_total > 0) {
             ptln("<p>".sprintf($this->lang['summary'],$this->_start+1,$this->_last,$this->_user_total,$this->_auth->getUserCount())."</p>");
         } else {
-            ptln("<p>".sprintf($this->lang['nonefound'],$this->_auth->getUserCount())."</p>");
+            if($this->_user_total < 0) {
+                $allUserTotal = 0;
+            } else {
+                $allUserTotal = $this->_auth->getUserCount();
+            }
+            ptln("<p>".sprintf($this->lang['nonefound'], $allUserTotal)."</p>");
         }
         ptln("<form action=\"".wl($ID)."\" method=\"post\">");
         formSecurityToken();