diff --git a/lib/stdio_protocol.ts b/lib/stdio_protocol.ts
index 3e96a8679f2..945513f7a6f 100644
--- a/lib/stdio_protocol.ts
+++ b/lib/stdio_protocol.ts
@@ -352,7 +352,10 @@ else if (typeof Buffer !== 'undefined') {
 
     return buffer;
   };
-  decodeUTF8 = bytes => Buffer.from(bytes).toString();
+  decodeUTF8 = bytes => {
+    let { buffer, byteOffset, byteLength } = bytes;
+    return Buffer.from(buffer, byteOffset, byteLength).toString();
+  }
 }
 
 else {