diff --git a/src/common/InputHandler.test.ts b/src/common/InputHandler.test.ts
index 78ce646a..1325cf0f 100644
--- a/src/common/InputHandler.test.ts
+++ b/src/common/InputHandler.test.ts
@@ -2314,7 +2314,7 @@ describe('InputHandler', () => {
     });
     it('DEC privates with set/reset semantic', async () => {
       // initially reset
-      const reset = [1, 6, 9, 12, 45, 66, 1000, 1002, 1003, 1004, 1006, 1016, 47, 1047, 1049, 2004];
+      const reset = [1, 6, 9, 12, 45, 66, 1000, 1002, 1003, 1004, 1006, 1016, 47, 1047, 1049, 2004, 2026];
       for (const mode of reset) {
         await inputHandler.parseP(`\x1b[?${mode}$p`);
         assert.deepEqual(reportStack.pop(), `\x1b[?${mode};2$y`);   // initial reset
diff --git a/src/common/InputHandler.ts b/src/common/InputHandler.ts
index 1e61a7cb..ba53941a 100644
--- a/src/common/InputHandler.ts
+++ b/src/common/InputHandler.ts
@@ -2298,6 +2298,7 @@ export class InputHandler extends Disposable implements IInputHandler {
     if (p === 1048) return f(p, V.SET); // xterm always returns SET here
     if (p === 47 || p === 1047 || p === 1049) return f(p, b2v(active === alt));
     if (p === 2004) return f(p, b2v(dm.bracketedPasteMode));
+    if (p === 2026) return f(p, b2v(dm.synchronizedOutput));
     return f(p, V.NOT_RECOGNIZED);
   }