diff --git a/docs/spelling_wordlist.txt b/docs/spelling_wordlist.txt
index b46287ab7..e8761136a 100644
--- a/docs/spelling_wordlist.txt
+++ b/docs/spelling_wordlist.txt
@@ -74,6 +74,7 @@ regexs
 repo
 runtime
 runtimes
+str
 subclassable
 subclassing
 subprotocol