diff --git a/Library/Homebrew/os/mac/version.rb b/Library/Homebrew/os/mac/version.rb
index db6dfcb1a6..8c9c4e39e6 100644
--- a/Library/Homebrew/os/mac/version.rb
+++ b/Library/Homebrew/os/mac/version.rb
@@ -4,6 +4,7 @@ module OS
   module Mac
     class Version < ::Version
       SYMBOLS = {
+        mojave: "10.14",
         high_sierra: "10.13",
         sierra: "10.12",
         el_capitan: "10.11",