diff --git a/src/EventPayload.ts b/src/EventPayload.ts
index 2945bd5..7627718 100644
--- a/src/EventPayload.ts
+++ b/src/EventPayload.ts
@@ -113,6 +113,8 @@ export interface EventPayload {
   pages?: {
     /** The scope of an action. Applies to Pages events. */
     scope?: string;
+    /** The legacy identifier of the event. */
+    originalEventName?: string;
     /* The UID of the site an event was tied to. */
     siteUid?: number;
     /* The ID of the template from which a site was generated. */