diff --git a/src/main/native-chat/agent-session-wire/structured-agent-session-host.ts b/src/main/native-chat/agent-session-wire/structured-agent-session-host.ts
index 26d8650d3ce5..d223862c1503 100644
--- a/src/main/native-chat/agent-session-wire/structured-agent-session-host.ts
+++ b/src/main/native-chat/agent-session-wire/structured-agent-session-host.ts
@@ -336,8 +336,7 @@ export class StructuredAgentSessionHost {
   journalSnapshot = async (sessionId: string): Promise<AgentJournalSnapshot> =>
     (await this.lifetime.conversation(sessionId)).journal.snapshot()
 
-  subscribe = (input: AgentSessionSubscribeInput): Promise<() => void> =>
-    this.backgroundTasks.subscribe(input)
+  subscribe = (input: AgentSessionSubscribeInput) => this.backgroundTasks.subscribe(input)
 
   settleLateDispatch = (input: Parameters<typeof settleStructuredAgentSessionLateDispatch>[1]) =>
     settleStructuredAgentSessionLateDispatch(this.mutationContext(), input)