diff --git a/README.md b/README.md
index 762ae57..4efa49c 100644
--- a/README.md
+++ b/README.md
@@ -3,5 +3,8 @@ library. It is meant to be used standalone in applications and
 programming language implementations, and perhaps even as a reference
 for LIBM implementations in OSes.
 
+OpenLIBM builds on Linux and Mac OS X, and with little effort, 
+should build on FreeBSD as well.
+
 The OpenLIBM code derives from the FreeBSD msun implementation, which
 in turn derives from FDLIBM 5.3.