diff --git a/Library/Homebrew/cmd/tap.rb b/Library/Homebrew/cmd/tap.rb
index 68fd8d1937..b902510452 100644
--- a/Library/Homebrew/cmd/tap.rb
+++ b/Library/Homebrew/cmd/tap.rb
@@ -2,6 +2,7 @@
 # frozen_string_literal: true
 
 require "abstract_command"
+require "tap"
 
 module Homebrew
   module Cmd