diff --git a/bin/generate-identifier-regex.js b/bin/generate-identifier-regex.js
new file mode 100644
index 0000000000..e9f3551032
--- /dev/null
+++ b/bin/generate-identifier-regex.js
@@ -0,0 +1,53 @@
+// Which Unicode version should be used?
+var version = '8.0.0';
+
+var start = require('unicode-' + version + '/properties/ID_Start/code-points')
+    .filter(function(ch) { return ch > 127; });
+var last = -1;
+var cont = [0x200c, 0x200d].concat(require('unicode-' + version + '/properties/ID_Continue/code-points')
+    .filter(function(ch) { return ch > 127 && search(start, ch, last + 1) == -1; }));
+
+function search(arr, ch, starting) {
+  for (var i = starting; arr[i] <= ch && i < arr.length; last = i++)
+    if (arr[i] === ch)
+      return i;
+  return -1;
+}
+
+function pad(str, width) {
+  while (str.length < width) str = "0" + str;
+  return str;
+}
+
+function esc(code) {
+  var hex = code.toString(16);
+  if (hex.length <= 2) return "\\x" + pad(hex, 2);
+  else return "\\u" + pad(hex, 4);
+}
+
+function generate(chars) {
+  var astral = [], re = "";
+  for (var i = 0, at = 0x10000; i < chars.length; i++) {
+    var from = chars[i], to = from;
+    while (i < chars.length - 1 && chars[i + 1] == to + 1) {
+      i++;
+      to++;
+    }
+    if (to <= 0xffff) {
+      if (from == to) re += esc(from);
+      else if (from + 1 == to) re += esc(from) + esc(to);
+      else re += esc(from) + "-" + esc(to);
+    } else {
+      astral.push(from - at, to - from);
+      at = to;
+    }
+  }
+  return {nonASCII: re, astral: astral};
+}
+
+var startData = generate(start), contData = generate(cont);
+
+console.log("let nonASCIIidentifierStartChars = \"" + startData.nonASCII + "\"");
+console.log("let nonASCIIidentifierChars = \"" + contData.nonASCII + "\"");
+console.log("const astralIdentifierStartCodes = " + JSON.stringify(startData.astral));
+console.log("const astralIdentifierCodes = " + JSON.stringify(contData.astral));
diff --git a/package.json b/package.json
index 336ef39c3b..15b85586a7 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,8 @@
     "babel-preset-react": "^6.0.0",
     "babel-preset-stage-0": "^6.5.0",
     "kcheck": "^2.0.1",
-    "lodash": "^4.6.1"
+    "lodash": "^4.6.1",
+    "unicode-7.0.0": "~0.1.5"
   },
   "bin": {
     "babylon": "./bin/babylon.js"