diff --git a/Kernel/FileSystem/FileDescription.h b/Kernel/FileSystem/FileDescription.h
index ecd7bc6b5f..5ad052cf82 100644
--- a/Kernel/FileSystem/FileDescription.h
+++ b/Kernel/FileSystem/FileDescription.h
@@ -47,6 +47,7 @@ class Socket;
 class TTY;
 
 class FileDescription : public RefCounted<FileDescription> {
+    MAKE_SLAB_ALLOCATED(FileDescription)
 public:
     static NonnullRefPtr<FileDescription> create(Custody&);
     static NonnullRefPtr<FileDescription> create(File&);