diff --git a/Library/Homebrew/cask/artifact/abstract_uninstall.rb b/Library/Homebrew/cask/artifact/abstract_uninstall.rb
index ce85fd6a65..272404635c 100644
--- a/Library/Homebrew/cask/artifact/abstract_uninstall.rb
+++ b/Library/Homebrew/cask/artifact/abstract_uninstall.rb
@@ -4,6 +4,7 @@ require "timeout"
 
 require "utils/user"
 require "cask/artifact/abstract_artifact"
+require "cask/pkg"
 require "extend/hash_validator"
 using HashValidator