diff --git a/js/externals.js b/js/externals.js
index f4ec96f..7c6552e 100644
--- a/js/externals.js
+++ b/js/externals.js
@@ -67,6 +67,7 @@ module.exports = (ENV, PATHS, module) => {
       'lib/DataFormat': 'DataFormat',
       'lib/formatWrittenNumber': 'formatWrittenNumber',
       'lib/getFormState': 'getFormState',
+      'lib/getJsonErrorMessage': 'getJsonErrorMessage',
       'lib/Injector': 'Injector',
       'lib/ReactRouteRegister': 'ReactRouteRegister',
       'lib/reduxFieldReducer': 'reduxFieldReducer',