diff --git a/boot.php b/boot.php
index cc88f69..3a5b62b 100644
--- a/boot.php
+++ b/boot.php
@@ -1,9 +1,5 @@
 <?php
 
-if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN' && !defined('WINDOWS_BUILD')) {
-    define('WINDOWS_BUILD', 1);
-}
-
 // Load configuration
 $config = new GitList\Config('config.ini');
 $config->set('git', 'repositories', rtrim($config->get('git', 'repositories'), DIRECTORY_SEPARATOR) . DIRECTORY_SEPARATOR);
diff --git a/src/GitList/Component/Git/Repository.php b/src/GitList/Component/Git/Repository.php
index 1d27985..214bf43 100644
--- a/src/GitList/Component/Git/Repository.php
+++ b/src/GitList/Component/Git/Repository.php
@@ -227,7 +227,7 @@ class Repository
      */
     public function getTotalCommits($file = null)
     {
-        if (WINDOWS_BUILD) {
+        if (defined('PHP_WINDOWS_VERSION_BUILD')) {
             $command = "rev-list --count --all $file";
         } else {
             $command = "rev-list --all $file | wc -l";