diff --git a/Library/Homebrew/cask/dsl.rb b/Library/Homebrew/cask/dsl.rb
index d7648987a0..e56bfc9a18 100644
--- a/Library/Homebrew/cask/dsl.rb
+++ b/Library/Homebrew/cask/dsl.rb
@@ -281,7 +281,7 @@ module Cask
     end
 
     def discontinued?
-      @caveats&.discontinued?
+      @caveats&.discontinued? == true
     end
 
     # @api public