diff --git a/README.md b/README.md
index 1a1819d8..5630f5d3 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@ see the manual for 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, OpenBSD and OS X, Plan 9, Windows, iOS, Android,
+NetBSD, OpenBSD, DragonFlyBSD, OS X, Plan 9, Windows, 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.
diff --git a/doc/chibi.scrbl b/doc/chibi.scrbl
index 199ed21e..d6afe43f 100755
--- a/doc/chibi.scrbl
+++ b/doc/chibi.scrbl
@@ -29,7 +29,7 @@ best and customize the rest.  Adding your own primitives or wrappers
 around existing C libraries is easy with the C FFI.
 
 Chibi is known to build and run on 32 and 64-bit Linux, OpenBSD, FreeBSD,
-DragonFly, OS X, iOS, Windows (under Cygwin) and Plan9.
+DragonFlyBSD, OS X, iOS, Windows (under Cygwin) and Plan9.
 
 \section{Installation}