diff --git a/puppet/src/contentscript.js b/puppet/src/contentscript.js
index faf2518..2cd568c 100644
--- a/puppet/src/contentscript.js
+++ b/puppet/src/contentscript.js
@@ -22,7 +22,7 @@
  * @return {Promise<Date>}
  */
 window.__chronoParseDate = function (text, ref, option) {}
-window._tryParseDateByTimeZone = function (text, ref, option) { }
+window.__tryParseDateByTimeZone = function (text, ref, option) { }
 /**
  * @param {...string} text - The objects to log.
  * @return {Promise<void>}