diff --git a/server/src/types/Message.ts b/server/src/types/Message.ts
index 64af59b4c..41b6e0966 100644
--- a/server/src/types/Message.ts
+++ b/server/src/types/Message.ts
@@ -8,4 +8,5 @@ export interface Message {
         lon: number
         geohash?: string
     }
+    visibleToUids?: Array<string>
 }