diff --git a/LICENSE b/LICENSE
index 9ff2d0d6..88bf75bb 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,4 +1,4 @@
-Copyright (c) 2004-2021 Fabien Potencier
+Copyright (c) 2004-2022 Fabien Potencier
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/Pipes/AbstractPipes.php b/Pipes/AbstractPipes.php
index 015816c4..01051005 100644
--- a/Pipes/AbstractPipes.php
+++ b/Pipes/AbstractPipes.php
@@ -47,7 +47,9 @@ public function __construct($input)
     public function close()
     {
         foreach ($this->pipes as $pipe) {
-            fclose($pipe);
+            if (\is_resource($pipe)) {
+                fclose($pipe);
+            }
         }
         $this->pipes = [];
     }