diff --git a/typings/xterm-headless.d.ts b/typings/xterm-headless.d.ts
index 1c0a986a..7453b7e2 100644
--- a/typings/xterm-headless.d.ts
+++ b/typings/xterm-headless.d.ts
@@ -19,8 +19,7 @@ declare module 'xterm-headless' {
   export interface ITerminalOptions {
     /**
      * Whether to allow the use of proposed API. When false, any usage of APIs
-     * marked as experimental/proposed will throw an error. This defaults to
-     * true currently, but will change to false in v5.0.
+     * marked as experimental/proposed will throw an error. The default is false.
      */
     allowProposedApi?: boolean;