diff --git a/rollup.config.mjs b/rollup.config.mjs
index 44424071b86..e9a6e342096 100644
--- a/rollup.config.mjs
+++ b/rollup.config.mjs
@@ -104,6 +104,7 @@ function createConfig(format, output, plugins = []) {
   const isCompatBuild = !!packageOptions.compat
 
   output.exports = isCompatPackage ? 'auto' : 'named'
+  output.esModule = true
   output.sourcemap = !!process.env.SOURCE_MAP
   output.externalLiveBindings = false