diff --git a/classes/gpm.php b/classes/gpm.php
index 2b429e4b..45f35d9c 100644
--- a/classes/gpm.php
+++ b/classes/gpm.php
@@ -9,10 +9,16 @@ use Grav\Common\GPM\Upgrader;
 use Grav\Common\Filesystem\Folder;
 use Grav\Common\GPM\Common\Package;
 
+/**
+ * Class Gpm
+ * @package Grav\Plugin\Admin
+ */
 class Gpm
 {
     // Probably should move this to Grav DI container?
+    /** @var GravGPM */
     protected static $GPM;
+
     public static function GPM()
     {
         if (!static::$GPM) {
@@ -86,8 +92,6 @@ class Gpm
             Installer::install($local, $options['destination'], ['install_path' => $package->install_path, 'theme' => $options['theme']]);
             Folder::delete(dirname($local));
 
-            $errorCode = Installer::lastErrorCode();
-
             if (Installer::lastErrorCode() & (Installer::ZIP_OPEN_ERROR | Installer::ZIP_EXTRACT_ERROR)) {
                 return false;
             }