diff --git a/src/dispatcher/actions.ts b/src/dispatcher/actions.ts
index be292774de..ce27f9b289 100644
--- a/src/dispatcher/actions.ts
+++ b/src/dispatcher/actions.ts
@@ -102,6 +102,7 @@ export enum Action {
 
     /**
      * Fired when CallHandler has checked for PSTN protocol support
+     * payload: none
      * XXX: Is an action the right thing for this?
      */
     PstnSupportUpdated = "pstn_support_updated",