diff --git a/htdocs/asterisk/cidlookup.php b/htdocs/asterisk/cidlookup.php
index 771b2e29979..e50a1a74a1b 100644
--- a/htdocs/asterisk/cidlookup.php
+++ b/htdocs/asterisk/cidlookup.php
@@ -30,7 +30,7 @@
 include '../master.inc.php';
 
 $phone = GETPOST('phone');
-$notfound = $phone;
+$notfound = $langs->trans("Unknown");
  
 // Security check
 if (empty($conf->clicktodial->enabled))