diff --git a/Library/Homebrew/cask/lib/hbc/cask.rb b/Library/Homebrew/cask/lib/hbc/cask.rb
index 9407947e6f..e318880153 100644
--- a/Library/Homebrew/cask/lib/hbc/cask.rb
+++ b/Library/Homebrew/cask/lib/hbc/cask.rb
@@ -56,7 +56,7 @@ module Hbc
     end
 
     def full_name
-      return token if tap.user == "Homebrew"
+      return token if tap&.user == "Homebrew"
       qualified_token
     end