diff --git a/.github/actions/spelling/excludes.txt b/.github/actions/spelling/excludes.txt
index f2b672b468..c7917f9754 100644
--- a/.github/actions/spelling/excludes.txt
+++ b/.github/actions/spelling/excludes.txt
@@ -4,6 +4,7 @@
 (?:^|/)(?i)LICEN[CS]E
 (?:^|/)generic\.zone$
 (?:^|/)package(?:-lock|)\.json$
+(?:^|/)src/contrib/libngtcp2/
 (?:^|/)vendor/
 [^/]\.mdb$
 [^/]\.signed$