diff --git a/packages/babel-plugin-proposal-unicode-property-regex/README.md b/packages/babel-plugin-proposal-unicode-property-regex/README.md
index c474291cff..483cdbbf2e 100644
--- a/packages/babel-plugin-proposal-unicode-property-regex/README.md
+++ b/packages/babel-plugin-proposal-unicode-property-regex/README.md
@@ -43,11 +43,18 @@ To transpile to ES6/ES2015:
 ```js
 require("@babel/core").transform(code, {
   "plugins": [
-    ["@babel/proposal-unicode-property-regex", { "useUnicodeFlag": true }]
+    ["@babel/proposal-unicode-property-regex", { "useUnicodeFlag": false }]
   ]
 });
 ```
 
+## Options
+
+* `useUnicodeFlag` (defaults to `true`)
+
+When disabled with `false`, the transform will convert unicode regexes to
+non-unicode regexes, removing the `u` flag. See https://www.npmjs.com/package/regexpu-core#useunicodeflag-default-false- for more information.
+
 ## Author
 
 | [![twitter/mathias](https://gravatar.com/avatar/24e08a9ea84deb17ae121074d0f17125?s=70)](https://twitter.com/mathias "Follow @mathias on Twitter") |
diff --git a/packages/babel-plugin-proposal-unicode-property-regex/src/index.js b/packages/babel-plugin-proposal-unicode-property-regex/src/index.js
index 81e53cf5a6..5da0afc52b 100644
--- a/packages/babel-plugin-proposal-unicode-property-regex/src/index.js
+++ b/packages/babel-plugin-proposal-unicode-property-regex/src/index.js
@@ -2,7 +2,7 @@ import rewritePattern from "regexpu-core";
 import * as regex from "@babel/helper-regex";
 
 export default function(api, options) {
-  const { useUnicodeFlag = false } = options;
+  const { useUnicodeFlag = true } = options;
   if (typeof useUnicodeFlag !== "boolean") {
     throw new Error(".useUnicodeFlag must be a boolean, or undefined");
   }
diff --git a/packages/babel-plugin-proposal-unicode-property-regex/test/fixtures/without-unicode-flag/options.json b/packages/babel-plugin-proposal-unicode-property-regex/test/fixtures/without-unicode-flag/options.json
index 7569ea5f63..755ed1dae5 100644
--- a/packages/babel-plugin-proposal-unicode-property-regex/test/fixtures/without-unicode-flag/options.json
+++ b/packages/babel-plugin-proposal-unicode-property-regex/test/fixtures/without-unicode-flag/options.json
@@ -1,5 +1,7 @@
 {
   "plugins": [
-    ["proposal-unicode-property-regex"]
+    ["proposal-unicode-property-regex", {
+      "useUnicodeFlag": false
+    }]
   ]
 }