diff --git a/map.json b/map.json
index 704f1326aa..3aefe0ab1a 100644
--- a/map.json
+++ b/map.json
@@ -5,7 +5,7 @@
   "cluster": null,
   "console": "console-browserify",
   "constants": "constants-browserify",
-  "crypto": "crypto-browserify",
+  "crypto": "../wrappers/crypto.js",
   "core-util-is": null,
   "dgram": null,
   "dns": null,
diff --git a/wrappers/crypto.js b/wrappers/crypto.js
new file mode 100644
index 0000000000..206074a0af
--- /dev/null
+++ b/wrappers/crypto.js
@@ -0,0 +1,2 @@
+global.Buffer = global.Buffer || require("buffer").Buffer;
+module.exports = require("crypto-browserify");