diff --git a/README b/README
index 9acc123..5cdd27c 100644
--- a/README
+++ b/README
@@ -8,7 +8,7 @@ Unices.
 
 This port requires pkg-config, Xft, Xinerama and Xrandr.  The included Makefile
 should work with both GNU make and BSD make.  It has been built successfully on
-OpenBSD, FreeBSD, NetBSD and Linux.
+OpenBSD, FreeBSD, NetBSD, OS X 10.9 and Linux.
 
 This version actively tracks changes in the OpenBSD CVS repository.
 Releases are roughly coordinated.