diff --git a/src/compiler/emitter.ts b/src/compiler/emitter.ts
index eacfd1f0b67..3441644f92b 100644
--- a/src/compiler/emitter.ts
+++ b/src/compiler/emitter.ts
@@ -38,9 +38,6 @@ var __assign = (this && this.__assign) || Object.assign || function(t) {
         s = arguments[i];
         for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
             t[p] = s[p];
-        if (typeof Object.getOwnPropertySymbols === "function")
-            for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++)
-                t[p[i]] = s[p[i]];
     }
     return t;
 };`;