diff --git a/protos/orchestrator_service.proto b/protos/orchestrator_service.proto
index afba929..df5143b 100644
--- a/protos/orchestrator_service.proto
+++ b/protos/orchestrator_service.proto
@@ -342,8 +342,10 @@ message OrchestratorResponse {
     // The number of work item events that were processed by the orchestrator.
     // This field is optional. If not set, the service should assume that the orchestrator processed all events.
     google.protobuf.Int32Value numEventsProcessed = 5;
-
     OrchestrationTraceContext orchestrationTraceContext = 6;
+
+    // Whether or not a history is required to complete the original OrchestratorRequest and none was provided.
+    bool requiresHistory = 7;
 }
 
 message CreateInstanceRequest {