diff --git a/docs/format/README.md b/docs/format/README.md
index 33126f638a..39db06fc57 100644
--- a/docs/format/README.md
+++ b/docs/format/README.md
@@ -3,3 +3,4 @@
 * [Index](index.md)
 * [Chunks](chunks.md)
 * [Tombstones](tombstones.md)
+* [Wal](wal.md)