diff --git a/README.md b/README.md
index 6bc38bdc..37b4383d 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,8 @@
 # Gio
 
-Immediate mode GUI programs in Go. See [gioui.org](https://gioui.org)
-for details and documentation.
+Immediate mode GUI programs in Go for Android, iOS, macOS, Linux,
+FreeBSD, Windows and WebAssembly. See [gioui.org](https://gioui.org) for details and
+documentation.
 
 [![builds.sr.ht status](https://builds.sr.ht/~eliasnaur/gio.svg)](https://builds.sr.ht/~eliasnaur/gio)