diff --git a/src/headless/public/Terminal.ts b/src/headless/public/Terminal.ts
index 0d4e6e93b..093ae7909 100644
--- a/src/headless/public/Terminal.ts
+++ b/src/headless/public/Terminal.ts
@@ -40,15 +40,6 @@ export class Terminal extends Disposable implements ITerminalApi {
     };
 
     for (const propName in this._core.options) {
-      Object.defineProperty(this._publicOptions, propName, {
-        get: () => {
-          return this._core.options[propName];
-        },
-        set: (value: any) => {
-          this._checkReadonlyOptions(propName);
-          this._core.options[propName] = value;
-        }
-      });
       const desc = {
         get: getter.bind(this, propName),
         set: setter.bind(this, propName)