diff --git a/src/writer.js b/src/writer.js
index a9a8d9c64..17ff8089c 100644
--- a/src/writer.js
+++ b/src/writer.js
@@ -121,7 +121,7 @@ function Writer() {
     // list of operations to perform when finish() is called. This both allows us to allocate
     // buffers of the exact required size and reduces the amount of work we have to do compared
     // to first calculating over objects and then encoding over objects. In our case, the encoding
-    // part is just a linked list walk calling linked operations with already prepared values.
+    // part is just a linked list walk calling operations with already prepared values.
 }
 
 /**
diff --git a/src/writer_buffer.js b/src/writer_buffer.js
index 7167b7666..59ba327f8 100644
--- a/src/writer_buffer.js
+++ b/src/writer_buffer.js
@@ -36,7 +36,10 @@ var writeBytesBuffer = Buffer && Buffer.prototype instanceof Uint8Array && Buffe
     }
     /* istanbul ignore next */
     : function writeBytesBuffer_copy(val, buf, pos) {
-        val.copy(buf, pos, 0, val.length);
+        if (val.copy)
+            val.copy(buf, pos, 0, val.length);
+        else for (var i = 0; i < val.length;)
+            buf[pos++] = val[i++];
     };
 
 /**