Link to heapsize2 files
diff --git a/examples/heapsize2/README.md b/examples/heapsize2/README.md
index 100a448..83355f2 100644
--- a/examples/heapsize2/README.md
+++ b/examples/heapsize2/README.md
@@ -5,3 +5,7 @@
This is the same example as the unhygienic stable [`heapsize`](../heapsize)
example. Please read that other example first before diving into this one, as
the comments here assume an understanding of how the other one works.
+
+- [`heapsize/src/lib.rs`](heapsize/src/lib.rs) (unchanged)
+- [`heapsize_derive/src/lib.rs`](heapsize_derive/src/lib.rs)
+- [`example/src/main.rs`](example/src/main.rs)