diff --git a/docs/source/spelling_wordlist.txt b/docs/source/spelling_wordlist.txt
index 4fc50e3c..75e5351c 100644
--- a/docs/source/spelling_wordlist.txt
+++ b/docs/source/spelling_wordlist.txt
@@ -70,3 +70,4 @@ SGD
 CHANGELOG
 Changelog
 CPython
+nn