diff --git a/README.md b/README.md
index 120e2b1..9b7ae92 100644
--- a/README.md
+++ b/README.md
@@ -27,8 +27,9 @@ The test suite that exercises GSL has been built and passes successfully on the
 * Windows using GCC 5.1
 * GNU/Linux using Clang/LLVM 3.6
 * GNU/Linux using GCC 5.1
-* OS X Yosemite using Xcode with AppleClang 7.0.0.7000072
+* OS X Yosemite using Xcode with Apple Clang 7.0.0.7000072
 * OS X Yosemite using GCC-5.2.0
+* OS X Sierra 10.12.4 using Apple LLVM version 8.1.0 (Clang-802.0.42)
 * FreeBSD 10.x with Clang/LLVM 3.6
 
 > If you successfully port GSL to another platform, we would love to hear from you. Please submit an issue to let us know. Also please consider