diff --git a/htdocs/asterisk/cidlookup.php b/htdocs/asterisk/cidlookup.php
index d1dcb501f41..6b566e60f55 100644
--- a/htdocs/asterisk/cidlookup.php
+++ b/htdocs/asterisk/cidlookup.php
@@ -28,10 +28,17 @@
  *
  */
 
-$phone = $_GET['phone'];
 
 include '../master.inc.php';
 
+$phone = GETPOST('phone');
+
+
+// Security check
+if (empty($conf->clicktodial->enabled)) {
+    print "Error: Module Click to dial not active\n";
+    exit;
+}
 
 // Check parameters
 if (empty($phone))