diff --git a/scripts/build-phar.php b/scripts/build-phar.php
index 57bf3fd2d3..1b8ebfcf43 100644
--- a/scripts/build-phar.php
+++ b/scripts/build-phar.php
@@ -175,5 +175,5 @@ function stripWhitespaceAndComments($fullpath, $config)
 }
 
 echo PHP_EOL;
-echo 'Filesize generated phpcs.phar file: '.filesize(dirname(__DIR__).'/phpcs.phar').' bytes'.PHP_EOL;
-echo 'Filesize generated phpcs.phar file: '.filesize(dirname(__DIR__).'/phpcbf.phar').' bytes'.PHP_EOL;
+echo 'Filesize generated phpcs.phar file: '.number_format(filesize(dirname(__DIR__).'/phpcs.phar'), 0, ',', '.').' bytes'.PHP_EOL;
+echo 'Filesize generated phpcs.phar file: '.number_format(filesize(dirname(__DIR__).'/phpcbf.phar'), 0, ',', '.').' bytes'.PHP_EOL;