diff --git a/lib/_stream_duplex.js b/lib/_stream_duplex.js
index 27686b1490f4e5..858dc938f01cd1 100644
--- a/lib/_stream_duplex.js
+++ b/lib/_stream_duplex.js
@@ -108,6 +108,16 @@ Object.defineProperty(Duplex.prototype, 'writableFinished', {
   }
 });
 
+Object.defineProperty(Duplex.prototype, 'writableCorked', {
+  // Making it explicit this property is not enumerable
+  // because otherwise some prototype manipulation in
+  // userland will fail
+  enumerable: false,
+  get() {
+    return this._writableState ? this._writableState.corked : 0;
+  }
+});
+
 Object.defineProperty(Duplex.prototype, 'writableEnded', {
   // Making it explicit this property is not enumerable
   // because otherwise some prototype manipulation in