diff --git a/reactos/ntoskrnl/io/iomgr/iofunc.c b/reactos/ntoskrnl/io/iomgr/iofunc.c
index 110b6c07626..7cbaf5870a9 100644
--- a/reactos/ntoskrnl/io/iomgr/iofunc.c
+++ b/reactos/ntoskrnl/io/iomgr/iofunc.c
@@ -1979,6 +1979,9 @@ NtReadFile(IN HANDLE FileHandle,
                                         IopReadTransfer);
 }
 
+/*
+ * @unimplemented
+ */
 NTSTATUS
 NTAPI
 NtReadFileScatter(IN HANDLE FileHandle,