diff --git a/typings/xterm-headless.d.ts b/typings/xterm-headless.d.ts
index 11d97947..ba5f22de 100644
--- a/typings/xterm-headless.d.ts
+++ b/typings/xterm-headless.d.ts
@@ -1370,6 +1370,13 @@ declare module '@xterm/headless' {
      * Send FocusIn/FocusOut events: `CSI ? 1 0 0 4 h`
      */
     readonly sendFocusMode: boolean;
+    /**
+     * Synchronized Output Mode: `CSI ? 2 0 2 6 h`
+     *
+     * When enabled, output is buffered and only rendered when the mode is
+     * disabled, allowing for atomic screen updates without tearing.
+     */
+    readonly synchronizedOutputMode: boolean;
     /**
      * Auto-Wrap Mode (DECAWM): `CSI ? 7 h`
      */