diff --git a/Library/Homebrew/software_spec.rb b/Library/Homebrew/software_spec.rb
index 513efdbafe..a08261c978 100644
--- a/Library/Homebrew/software_spec.rb
+++ b/Library/Homebrew/software_spec.rb
@@ -392,10 +392,9 @@ class BottleSpecification
 
   def checksums
     tags = collector.keys.sort_by do |tag|
-      # Sort non-MacOS tags below MacOS tags.
-
-      OS::Mac::Version.from_symbol tag
+      "#{OS::Mac::Version.from_symbol(tag)}_#{tag}"
     rescue MacOSVersionError
+      # Sort non-MacOS tags below MacOS tags.
       "0.#{tag}"
     end
     checksums = {}