diff --git a/Library/Homebrew/os/mac.rb b/Library/Homebrew/os/mac.rb
index cdf528e39e..900845859b 100644
--- a/Library/Homebrew/os/mac.rb
+++ b/Library/Homebrew/os/mac.rb
@@ -270,6 +270,7 @@ module OS
       "7.1"   => { :clang => "7.0", :clang_build => 700 },
       "7.1.1" => { :clang => "7.0", :clang_build => 700 },
       "7.2"   => { :clang => "7.0", :clang_build => 700 },
+      "7.2.1" => { :clang => "7.0", :clang_build => 700 },
     }
 
     def compilers_standard?