diff --git a/README.md b/README.md
index 40ea7cda..d356e92f 100644
--- a/README.md
+++ b/README.md
@@ -20,8 +20,8 @@ instructions on compiling with fewer features or requesting
 a smaller language on startup.
 
 Chibi-Scheme is known to work on **32** and **64-bit** Linux, FreeBSD,
-NetBSD and OS X, Plan 9, Windows (using Cygwin), iOS, Android, ARM and
-[Emscripten](https://kripken.github.io/emscripten-site).  Basic
+NetBSD, OpenBSD and OS X, Plan 9, Windows (using Cygwin), iOS, Android,
+ARM and [Emscripten](https://kripken.github.io/emscripten-site).  Basic
 support for native Windows desktop also exists. See README-win32.md
 for details and build instructions.