diff --git a/implementations/javascript/src/values.js b/implementations/javascript/src/values.js
index b786cf0..ef4d6d4 100644
--- a/implementations/javascript/src/values.js
+++ b/implementations/javascript/src/values.js
@@ -133,8 +133,10 @@ function Bytes(maybeByteIterable) {
     _installView.call(this, new Uint8Array(maybeByteIterable));
   } else if (typeof maybeByteIterable.length === 'number') {
     _installView.call(this, Uint8Array.from(maybeByteIterable));
+  } else if (maybeByteIterable instanceof Bytes) {
+    _installView.call(this, maybeByteIterable._view);
   } else if (typeof maybeByteIterable.size === 'number') {
-    _installView.call(this, new ArrayBuffer(maybeByteIterable.size));
+    _installView.call(this, new Uint8Array(maybeByteIterable.size));
     for (let i = 0; i < this.size; i++) { this._view[i] = maybeByteIterable.get(i); }
   } else {
     const e = new TypeError("Attempt to initialize Bytes from unsupported value");