diff --git a/types/google-apps-script/google-apps-script.card.d.ts b/types/google-apps-script/google-apps-script.card.d.ts
index 62d497eb4f..d879d30091 100644
--- a/types/google-apps-script/google-apps-script.card.d.ts
+++ b/types/google-apps-script/google-apps-script.card.d.ts
@@ -82,6 +82,10 @@ declare namespace GoogleAppsScript {
              * Sets the URL to navigate to when the action is activated.
              */
             setOpenLink(openLink: OpenLink): ActionResponseBuilder;
+            /**
+             * Sets a flag to indicate that this action changed the existing data state.
+             */
+            setStateChanged(stateChanged: boolean): ActionResponseBuilder;
         }
 
         export interface AuthorizationAction {