diff --git a/packages/shared/src/types.ts b/packages/shared/src/types.ts
index 38a2bc93..e0376c82 100644
--- a/packages/shared/src/types.ts
+++ b/packages/shared/src/types.ts
@@ -748,6 +748,7 @@ export interface FederationRelayEvent {
 
 export interface FederationRelayReaction {
   messageId?: string;
+  messageHomeInstance?: string;
   userId: string;
   homeUserId: string;
   emoji: string;