diff --git a/Library/Homebrew/cmd/bottle.rb b/Library/Homebrew/cmd/bottle.rb
index 42b1daba62..f9a6e968fa 100644
--- a/Library/Homebrew/cmd/bottle.rb
+++ b/Library/Homebrew/cmd/bottle.rb
@@ -241,7 +241,7 @@ module Homebrew extend self
             odie 'Bottle block update failed!' unless string
           else
             update_or_add = 'add'
-            string = s.sub!(/(  (url|sha1|sha256|head|version) ['"][\S ]+['"]\n+)+/m, '\0' + output + "\n")
+            string = s.sub!(/(  (url|sha1|sha256|head|version|mirror) ['"][\S ]+['"]\n+)+/m, '\0' + output + "\n")
             odie 'Bottle block addition failed!' unless string
           end
         end