diff --git a/lodash.src.js b/lodash.src.js
index fc208e5e8..8201fba8b 100644
--- a/lodash.src.js
+++ b/lodash.src.js
@@ -275,7 +275,8 @@
 
   /** Detect free variable `global` from Node.js or Browserified code and use it as `root`. */
   var freeGlobal = freeExports && freeModule && typeof global == 'object' && global;
-  if (freeGlobal && (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal || freeGlobal.self === freeGlobal)) {
+  if (freeGlobal && (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal ||
+      (typeof freeGlobal.WorkerGlobalScope == 'function' && freeGlobal instanceof freeGlobal.WorkerGlobalScope))) {
     root = freeGlobal;
   }