diff --git a/doc/.custom_wordlist.txt b/doc/.custom_wordlist.txt
index 37619264ec24..9235d80bc495 100644
--- a/doc/.custom_wordlist.txt
+++ b/doc/.custom_wordlist.txt
@@ -228,6 +228,7 @@ SDN
 SDNs
 SDS
 SDT
+SDTs
 SeaBIOS
 Seccomp
 SELinux