diff --git a/appendix-bitcoin-fundamentals-review.asciidoc b/appendix-bitcoin-fundamentals-review.asciidoc
index 50b4ebc..028a463 100644
--- a/appendix-bitcoin-fundamentals-review.asciidoc
+++ b/appendix-bitcoin-fundamentals-review.asciidoc
@@ -1,3 +1,4 @@
+[appendix]
 [[bitcoin_fundamentals_review]]
 == Bitcoin Fundamentals Review