diff --git a/MACHINES b/MACHINES
index 4de04b3..62dd310 100644
--- a/MACHINES
+++ b/MACHINES
@@ -23,3 +23,5 @@ FSP Version	CPU         OS        	Compiler         C library
 2.8.1 Beta 25	i386	    FreeBSD 7.2 gcc-4.2.1
 2.8.1 Beta 27	i386	    FreeBSD 10.1-PRERELEASE Clang 3.4.1
 2.8.1 Beta 27	amd64	    Gentoo Linux 2014
+2.8.1 Beta 28   amd64       FreeBSD 11.3
+2.8.1 Beta 28   amd64       Gentoo Linux 17.1