diff --git a/README.md b/README.md
index 4354ae3c..b62d4834 100644
--- a/README.md
+++ b/README.md
@@ -21,7 +21,7 @@ OpenPGP.js [![Build Status](https://travis-ci.org/openpgpjs/openpgpjs.svg?branch
 
 * If the user's browser supports [native WebCrypto](http://caniuse.com/#feat=cryptography) via the `window.crypto.subtle` api, this will be used. Under node.js the native [crypto module](https://nodejs.org/api/crypto.html#crypto_crypto) is used. This can be deactivated by setting `openpgp.config.use_native = false`.
 
-* The library implements the [IETF proposal](https://tools.ietf.org/html/draft-ford-openpgp-format-00) for authenticated encryption [using native AES-GCM](https://github.com/openpgpjs/openpgpjs/pull/430). This makes symmetric encryption about 30x faster on supported platforms. Since the specification has not been finalized and other OpenPGP implementations haven't adopted it yet, the feature is currently behind a flag. You can activate it by setting `openpgp.config.aead_protect = true`.
+* The library implements the [IETF proposal](https://tools.ietf.org/html/draft-ford-openpgp-format-00) for authenticated encryption [using native AES-GCM](https://github.com/openpgpjs/openpgpjs/pull/430). This makes symmetric encryption about 30x faster on supported platforms. Since the specification has not been finalized and other OpenPGP implementations haven't adopted it yet, the feature is currently behind a flag. You can activate it by setting `openpgp.config.aead_protect = true`. **Note: activating this setting can break compatibility with other OpenPGP implementations, so be careful if that's one of your requirements.**
 
 * For environments that don't provide native crypto, the library falls back to [asm.js](http://caniuse.com/#feat=asmjs) implementations of AES, SHA-1, and SHA-256. We use [Rusha](https://github.com/srijs/rusha) and [asmCrypto Lite](https://github.com/openpgpjs/asmcrypto-lite) (a minimal subset of asmCrypto.js built specifically for OpenPGP.js).