diff --git a/packages/@lwc/ssr-client-utils/package.json b/packages/@lwc/ssr-client-utils/package.json
index 257839770e..00968ce0d9 100644
--- a/packages/@lwc/ssr-client-utils/package.json
+++ b/packages/@lwc/ssr-client-utils/package.json
@@ -32,7 +32,8 @@
     "types": "dist/index.d.ts",
     "files": [
         "dist/**/*.js",
-        "dist/**/*.d.ts"
+        "dist/**/*.d.ts",
+        "register-lwc-style.js"
     ],
     "scripts": {
         "build": "rollup --config ../../../scripts/rollup/rollup.config.js",