diff --git a/.github/styles/vocab.txt b/.github/styles/vocab.txt
index 9f6c7d386d..301c77ca6e 100644
--- a/.github/styles/vocab.txt
+++ b/.github/styles/vocab.txt
@@ -175,6 +175,7 @@ Spotify
 squidfunk
 src
 subkey
+subtree
 superfences
 Superfences
 superset