diff --git a/karaoke-management.php b/karaoke-management.php
index 9bcab67..6b77c32 100644
--- a/karaoke-management.php
+++ b/karaoke-management.php
@@ -48,6 +48,7 @@ function main()
                 break;
             }
             echo "Setting PHPSessionID...";
+            $id = $cmd[1];
             $file = file_get_contents( './config.inc.php' );
             $file = str_ireplace( "define( 'CURL_PHPSESSID', '' );", "define( 'CURL_PHPSESSID', '$id' );", $file );
             file_put_contents( './config.inc.php', $file );