diff --git a/docker/conf/apache2/sites-available/noblogs.org.conf b/docker/conf/apache2/sites-available/noblogs.org.conf
index ad2418d524fefe51e1e7cb34a37d9bc2b6d02166..2ed344d90d437fd208329ce93d0fcf7d53bb222d 100644
--- a/docker/conf/apache2/sites-available/noblogs.org.conf
+++ b/docker/conf/apache2/sites-available/noblogs.org.conf
@@ -25,9 +25,11 @@
 
         # Support ActivityPub content negotiation on user profiles.
         <Location /post/author/>
+                 Header onsuccess merge Vary "Accept"
                  Header always merge Vary "Accept"
         </Location>
         <Location /.well-known/>
+                 Header onsuccess merge Vary "Accept"
                  Header always merge Vary "Accept"
         </Location>