diff --git a/Library/Homebrew/os/linux.rb b/Library/Homebrew/os/linux.rb
index 0c5d025859..b295005c3a 100644
--- a/Library/Homebrew/os/linux.rb
+++ b/Library/Homebrew/os/linux.rb
@@ -68,5 +68,13 @@ module OS
         Version::NULL
       end
     end
+
+    module CLT
+      module_function
+
+      def version
+        Version::NULL
+      end
+    end
   end
 end