diff --git a/Library/Homebrew/extend/os/linux/cask/config.rb b/Library/Homebrew/extend/os/linux/cask/config.rb
index 8395e08e0ee33..756cc7bae142b 100644
--- a/Library/Homebrew/extend/os/linux/cask/config.rb
+++ b/Library/Homebrew/extend/os/linux/cask/config.rb
@@ -12,6 +12,7 @@ module ClassMethods
             vst_plugindir:  "~/.vst",
             vst3_plugindir: "~/.vst3",
             fontdir:        "#{ENV.fetch("XDG_DATA_HOME", "~/.local/share")}/fonts",
+            appdir:         "~/.config/apps",
           }.freeze, T::Hash[Symbol, String])
 
           sig { returns(T::Hash[Symbol, String]) }