diff --git a/fixtures/typings-test/typings-test.ts b/fixtures/typings-test/typings-test.ts
index 887eb322..d5e564c5 100644
--- a/fixtures/typings-test/typings-test.ts
+++ b/fixtures/typings-test/typings-test.ts
@@ -170,9 +170,9 @@ namespace methods_core {
       t.setOption('handler', (data: string) => console.log(data));
       t.setOption('bellSound', 'foo');
       t.setOption('bellStyle', 'none');
-      t.setOption('bellStyle', 'visual');
+      // t.setOption('bellStyle', 'visual');
       t.setOption('bellStyle', 'sound');
-      t.setOption('bellStyle', 'both');
+      // t.setOption('bellStyle', 'both');
       t.setOption('fontSize', 1);
       t.setOption('lineHeight', 1);
       t.setOption('fontFamily', 'foo');
diff --git a/typings/xterm.d.ts b/typings/xterm.d.ts
index 43be69c2..74654035 100644
--- a/typings/xterm.d.ts
+++ b/typings/xterm.d.ts
@@ -20,7 +20,7 @@ declare module 'xterm' {
     /**
      * The type of the bell notification the terminal will use.
      */
-    bellStyle?: 'none' | 'visual' | 'sound' | 'both';
+    bellStyle?: 'none' /*| 'visual'*/ | 'sound' /*| 'both'*/;
 
     /**
      * The number of columns in the terminal.