diff --git a/.github/actions/spelling/allow.txt b/.github/actions/spelling/allow.txt
index f03a164..0635ac8 100644
--- a/.github/actions/spelling/allow.txt
+++ b/.github/actions/spelling/allow.txt
@@ -1364,6 +1364,7 @@ lsec
 lsqminnorm
 lsqr
 ltest
+lts
 lvector
 lwidth
 macos