diff --git a/src/Config/DefaultsConfig.php b/src/Config/DefaultsConfig.php
index a938ea746..fec838fea 100644
--- a/src/Config/DefaultsConfig.php
+++ b/src/Config/DefaultsConfig.php
@@ -101,7 +101,7 @@ protected function getHomeDir()
         $home = getenv('HOME');
         if (!$home) {
             $system = '';
-            if (getenv('MSYSTEM') !== null) {
+            if (getenv('MSYSTEM')) {
                 $system = strtoupper(substr(getenv('MSYSTEM'), 0, 4));
             }
             if ($system != 'MING') {