diff --git a/scripts/build.js b/scripts/build.js
index 26e287c43..fde0b17ca 100644
--- a/scripts/build.js
+++ b/scripts/build.js
@@ -169,6 +169,7 @@ function checkAllSizes(targets) {
 function checkSize(target) {
   const pkgDir = path.resolve(`packages/${target}`)
   checkFileSize(`${pkgDir}/dist/${target}.global.prod.js`)
+  checkFileSize(`${pkgDir}/dist/${target}.runtime.global.prod.js`)
 }
 
 function checkFileSize(filePath) {