diff --git a/Library/Homebrew/cask/cask.rb b/Library/Homebrew/cask/cask.rb
index 295f69e8048a9..db0a7ccae2786 100644
--- a/Library/Homebrew/cask/cask.rb
+++ b/Library/Homebrew/cask/cask.rb
@@ -425,6 +425,7 @@ def to_h
         "version"                         => version,
         "autobump"                        => autobump?,
         "no_autobump_message"             => no_autobump_message,
+        "livecheck_defined"               => livecheck_defined?,
         "skip_livecheck"                  => livecheck.skip?,
         "installed"                       => installed_version,
         "installed_time"                  => install_time&.to_i,
diff --git a/Library/Homebrew/formula.rb b/Library/Homebrew/formula.rb
index 625d7a7574400..3631f33c61924 100644
--- a/Library/Homebrew/formula.rb
+++ b/Library/Homebrew/formula.rb
@@ -2864,6 +2864,7 @@ def to_hash
       "compatibility_version"           => compatibility_version,
       "autobump"                        => autobump?,
       "no_autobump_message"             => no_autobump_message,
+      "livecheck_defined"               => livecheck_defined?,
       "skip_livecheck"                  => livecheck.skip?,
       "bottle"                          => {},
       "pour_bottle_only_if"             => self.class.pour_bottle_only_if&.to_s,
diff --git a/Library/Homebrew/test/support/fixtures/cask/everything.json b/Library/Homebrew/test/support/fixtures/cask/everything.json
index c3163162f8bc0..1a73626669677 100644
--- a/Library/Homebrew/test/support/fixtures/cask/everything.json
+++ b/Library/Homebrew/test/support/fixtures/cask/everything.json
@@ -18,6 +18,7 @@
   "version": "1.2.3",
   "autobump": true,
   "no_autobump_message": null,
+  "livecheck_defined": false,
   "skip_livecheck": false,
   "installed": null,
   "installed_time": null,