diff --git a/node_modules/msgpack-js/msgpack.js b/node_modules/msgpack-js/msgpack.js
index 7f758538..abfcc904 100644
--- a/node_modules/msgpack-js/msgpack.js
+++ b/node_modules/msgpack-js/msgpack.js
@@ -202,7 +202,7 @@ function encode(value, buffer, offset) {
     // fix raw
     if (length < 0x20) {
       buffer[offset] = length | 0xa0;
-      buffer.write(value, offset + 1);
+      length && buffer.write(value, offset + 1);
       return 1 + length;
     }
     // raw 16