diff --git a/globals/globals.ts b/globals/globals.ts
index b0f51aba0..9d128c86e 100644
--- a/globals/globals.ts
+++ b/globals/globals.ts
@@ -127,6 +127,12 @@ if (typeof global.__metadata !== "function") {
     };
 }
 
+if (typeof global.__param !== "function") {
+    global.__param = (global && global.__param) || function (paramIndex, decorator) {
+        return function (target, key) { decorator(target, key, paramIndex); }
+    };
+}
+
 export function Deprecated(target: Object, key?: string | symbol, descriptor?: any) {
     if (descriptor) {
         var originalMethod = descriptor.value;
@@ -163,4 +169,4 @@ export function Experimental(target: Object, key?: string | symbol, descriptor?:
     }
 }
 
-global.Experimental = Experimental;
\ No newline at end of file
+global.Experimental = Experimental;