diff --git a/lib/internal/streams/duplexify.js b/lib/internal/streams/duplexify.js
index f75393244a6495..499e8feccbb8a1 100644
--- a/lib/internal/streams/duplexify.js
+++ b/lib/internal/streams/duplexify.js
@@ -7,6 +7,8 @@ const {
   isReadableNodeStream,
   isWritableNodeStream,
   isDuplexNodeStream,
+  isReadableFinished,
+  isWritableEnded,
 } = require('internal/streams/utils');
 const eos = require('internal/streams/end-of-stream');
 const {
diff --git a/lib/internal/streams/utils.js b/lib/internal/streams/utils.js
index 4cd78e4231a344..20b8676a766a07 100644
--- a/lib/internal/streams/utils.js
+++ b/lib/internal/streams/utils.js
@@ -75,7 +75,7 @@ function isDestroyed(stream) {
   const wState = stream._writableState;
   const rState = stream._readableState;
   const state = wState || rState;
-  return !!(stream.destroyed || stream[kDestroyed] || state?.destroyed);
+  return !!(stream.destroyed || state?.destroyed);
 }
 
 // Have been end():d.