diff --git a/buildtar.php b/buildtar.php
index 7a3319f..769c813 100755
--- a/buildtar.php
+++ b/buildtar.php
@@ -90,6 +90,7 @@ function deleteTreeIfDir($dir)
     if ( is_dir($dir) ) {
         switch (PHP_OS) {
             case 'Darwin':
+            case 'Linux':
                 system("rm -rf $dir");
                 break;
             case 'Windows':