1 files changed, 1 insertions, 1 deletions

diff --git a/server/lib/actor-follow-health-cache.ts b/server/lib/actor-follow-health-cache.ts
index ab8cc98df..34357a97a 100644
--- a/server/lib/actor-follow-health-cache.ts
+++ b/server/lib/actor-follow-health-cache.ts
@@ -12,7 +12,7 @@ class ActorFollowHealthCache {
   private pendingBadServer = new Set<number>()
   private pendingGoodServer = new Set<number>()
 
-  private badInboxes = new Set<string>()
+  private readonly badInboxes = new Set<string>()
 
   private constructor () {}