diff --git a/src/TOTP.php b/src/TOTP.php
index 8a1309df..8ee4b26a 100644
--- a/src/TOTP.php
+++ b/src/TOTP.php
@@ -18,7 +18,7 @@ class TOTP {
 
     public static function timecode(?int $timestamp = null, int $interval = self::INTERVAL): int {
         $timestamp = $timestamp ?? time();
-        return ($timestamp * 1000) / ($interval * 1000);
+        return (int)(($timestamp * 1000) / ($interval * 1000));
     }
 
     public function generate(?int $timestamp = null): string {