diff --git a/packages/ai/src/chatTransport.test.ts b/packages/ai/src/chatTransport.test.ts
index 3782dbe8d..89f67451d 100644
--- a/packages/ai/src/chatTransport.test.ts
+++ b/packages/ai/src/chatTransport.test.ts
@@ -809,7 +809,7 @@ describe("TriggerChatTransport", function () {
       onTriggeredRun: async function onTriggeredRun(state) {
         await sleep(1);
         observedRunId = state.runId;
-        observedState = { ...state };
+        observedState = state;
         callbackCompleted = true;
       },
     });
diff --git a/packages/ai/src/chatTransport.ts b/packages/ai/src/chatTransport.ts
index fec8c75f0..d80b2fdeb 100644
--- a/packages/ai/src/chatTransport.ts
+++ b/packages/ai/src/chatTransport.ts
@@ -177,7 +177,9 @@ export class TriggerChatTransport<
 
     if (this.onTriggeredRun) {
       try {
-        await this.onTriggeredRun(runState);
+        await this.onTriggeredRun({
+          ...runState,
+        });
       } catch {
         // Ignore callback errors so chat streaming can continue.
       }