diff --git a/src/Illuminate/Contracts/Filesystem/Filesystem.php b/src/Illuminate/Contracts/Filesystem/Filesystem.php
index 351cfe035420..1425871e5db6 100644
--- a/src/Illuminate/Contracts/Filesystem/Filesystem.php
+++ b/src/Illuminate/Contracts/Filesystem/Filesystem.php
@@ -2,6 +2,8 @@
 
 namespace Illuminate\Contracts\Filesystem;
 
+use Closure;
+
 interface Filesystem
 {
     /**