diff --git a/npm/runtime/package.json b/npm/runtime/package.json
index 0d43edf748cb6..7824428077f09 100644
--- a/npm/runtime/package.json
+++ b/npm/runtime/package.json
@@ -298,6 +298,15 @@
       "./src/helpers/decorate.js"
     ],
     "./helpers/esm/decorate": "./src/helpers/esm/decorate.js",
+    "./helpers/decorateMetadata": [
+      {
+        "node": "./src/helpers/decorateMetadata.js",
+        "import": "./src/helpers/esm/decorateMetadata.js",
+        "default": "./src/helpers/decorateMetadata.js"
+      },
+      "./src/helpers/decorateMetadata.js"
+    ],
+    "./helpers/esm/decorateMetadata": "./src/helpers/esm/decorateMetadata.js",
     "./helpers/decorateParam": [
       {
         "node": "./src/helpers/decorateParam.js",
@@ -306,7 +315,6 @@
       },
       "./src/helpers/decorateParam.js"
     ],
-    "./helpers/esm/decorateParam": "./src/helpers/esm/decorateParam.js",
     "./helpers/defaults": [
       {
         "node": "./src/helpers/defaults.js",
diff --git a/npm/runtime/src/helpers/decorateMetadata.js b/npm/runtime/src/helpers/decorateMetadata.js
new file mode 100644
index 0000000000000..802cba8ba2ed8
--- /dev/null
+++ b/npm/runtime/src/helpers/decorateMetadata.js
@@ -0,0 +1,9 @@
+// Copy from https://github.com/microsoft/TypeScript/blob/d85767abfd83880cea17cea70f9913e9c4496dcc/src/compiler/factory/emitHelpers.ts#L744-L753
+
+function __decorateMetadata(k, v) {
+  if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
+};
+
+(module.exports = __decorateMetadata),
+  (module.exports.__esModule = true),
+  (module.exports["default"] = module.exports);
diff --git a/npm/runtime/src/helpers/esm/decorateMetadata.js b/npm/runtime/src/helpers/esm/decorateMetadata.js
new file mode 100644
index 0000000000000..daa5b13e72b37
--- /dev/null
+++ b/npm/runtime/src/helpers/esm/decorateMetadata.js
@@ -0,0 +1,7 @@
+// Copy from https://github.com/microsoft/TypeScript/blob/d85767abfd83880cea17cea70f9913e9c4496dcc/src/compiler/factory/emitHelpers.ts#L744-L753
+
+function __decorateMetadata(k, v) {
+  if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
+};
+
+export { __decorateMetadata as default };