diff --git a/src/dev/build/tasks/nodejs_modules/clean_client_modules_on_dll_task.js b/src/dev/build/tasks/nodejs_modules/clean_client_modules_on_dll_task.js
index 27335b35374ba3..19d74bcf89e302 100644
--- a/src/dev/build/tasks/nodejs_modules/clean_client_modules_on_dll_task.js
+++ b/src/dev/build/tasks/nodejs_modules/clean_client_modules_on_dll_task.js
@@ -48,6 +48,8 @@ export const CleanClientModulesOnDLLTask = {
     ];
     const discoveredLegacyCorePluginEntries = await globby([
       `${baseDir}/src/legacy/core_plugins/*/index.js`,
+      // Small exception to load dynamically discovered functions for timelion plugin
+      `${baseDir}/src/legacy/core_plugins/timelion/server/*_functions/**/*.js`,
       `!${baseDir}/src/legacy/core_plugins/**/public`,
     ]);
     const discoveredPluginEntries = await globby([