diff --git a/html/includes/authenticate.inc.php b/html/includes/authenticate.inc.php
index 9fab0f72da..13bd8e8b9d 100644
--- a/html/includes/authenticate.inc.php
+++ b/html/includes/authenticate.inc.php
@@ -12,7 +12,7 @@ if (!is_dir($config['rrd_dir']))
 
 if (!is_dir($config['temp_dir']))
 {
-  echo("<div class='errorbox'>Temp Directory is missing ({$config['tmp_dir']}).  Graphing may fail.</div>");
+  echo("<div class='errorbox'>Temp Directory is missing ({$config['temp_dir']}).  Graphing may fail.</div>");
 }
 
 if (!is_writable($config['temp_dir']))