diff --git a/docs/src/bounty/3.md b/docs/src/bounty/3.md
index 905987d083..f8829baf6b 100644
--- a/docs/src/bounty/3.md
+++ b/docs/src/bounty/3.md
@@ -36,6 +36,9 @@ following [`ord`](https://github.com/casey/ord) command:
 ord wallet sats --tsv frequency.tsv
 ```
 
+This command requires the sat index, so `--index-sats` must be passed to ord
+when first creating the index.
+
 ### Part 0
 
 *Rare sats pair best with rare words.*