diff --git a/doc/spelling_wordlist.txt b/doc/spelling_wordlist.txt
index 0fc9cf4..38db9e1 100644
--- a/doc/spelling_wordlist.txt
+++ b/doc/spelling_wordlist.txt
@@ -91,6 +91,7 @@ docstrings
 ean
 Ean
 encodable
+Errno
 fff
 fullimage
 io
@@ -124,6 +125,7 @@ Todo
 traceback
 udev
 usb
+USBTimeoutError
 usec
 virtualenvs
 whitespaces