diff --git a/.gitignore b/.gitignore
index a7c280204e..8456a329f3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -23,6 +23,7 @@ resources/editor-functions.json
 resources/user-manual-translation-stats.json
 resources/editor.js
 resources/viewer.js
+resources/viewer.html
 resources/content-server/index-generated.html
 resources/content-server/calibre.appcache
 resources/content-server/locales.zip