diff --git a/SPEC/FILES.md b/SPEC/FILES.md
index b339d806f..a00a6f595 100644
--- a/SPEC/FILES.md
+++ b/SPEC/FILES.md
@@ -39,6 +39,8 @@ Where `data` may be:
 - a [`Buffer instance`][b]
 - a [`Readable Stream`][rs]
 - a [`Pull Stream`][ps]
+- a [`File System Path`] (caveat: will only work in Node.js)
+- a [`URL`]
 - an array of objects, each of the form:
 ```JavaScript
 {