diff --git a/lib/internal/webstreams/readablestream.js b/lib/internal/webstreams/readablestream.js
index 5cb4cc1e12d5f6..13db9f6453c880 100644
--- a/lib/internal/webstreams/readablestream.js
+++ b/lib/internal/webstreams/readablestream.js
@@ -476,7 +476,7 @@ class ReadableStream {
 
     async function returnSteps(value) {
       if (done)
-        return { done: true, value }; // eslint-disable-line node-core/avoid-prototype-pollution
+        return { __proto__: null, done: true, value };
       done = true;
 
       if (reader[kState].stream === undefined) {
@@ -488,11 +488,11 @@ class ReadableStream {
         const result = readableStreamReaderGenericCancel(reader, value);
         readableStreamReaderGenericRelease(reader);
         await result;
-        return { done: true, value }; // eslint-disable-line node-core/avoid-prototype-pollution
+        return { __proto__: null, done: true, value };
       }
 
       readableStreamReaderGenericRelease(reader);
-      return { done: true, value }; // eslint-disable-line node-core/avoid-prototype-pollution
+      return { __proto__: null, done: true, value };
     }
 
     // TODO(@jasnell): Explore whether an async generator