diff --git a/src/octoprint/server/views.py b/src/octoprint/server/views.py
index 9e3afe3b..2e8a25c0 100644
--- a/src/octoprint/server/views.py
+++ b/src/octoprint/server/views.py
@@ -301,7 +301,7 @@ def index():
 
 		decorated_view = view
 		decorated_view = util.flask.lastmodified(lambda _: compute_lastmodified())(decorated_view)
-		decorated_view = util.flask.etagged(lambda _: compute_etag(additional=cache_key()))(decorated_view)
+		decorated_view = util.flask.etagged(lambda _: compute_etag(additional=[cache_key()] + additional_etag))(decorated_view)
 		decorated_view = util.flask.cached(timeout=-1,
 		                                   refreshif=validate_cache,
 		                                   key=cache_key,