diff --git a/src/Composer/Command/InitCommand.php b/src/Composer/Command/InitCommand.php
index c352b1829..d8ebe2e09 100644
--- a/src/Composer/Command/InitCommand.php
+++ b/src/Composer/Command/InitCommand.php
@@ -115,7 +115,7 @@ EOT
             }
         }
 
-        $file = new JsonFile('composer.json');
+        $file = new JsonFile(Factory::getComposerFile());
         $json = $file->encode($options);
 
         if ($input->isInteractive()) {