diff --git a/src/pdf.js b/src/pdf.js
index 694891ca3..6d838eb5c 100644
--- a/src/pdf.js
+++ b/src/pdf.js
@@ -42,10 +42,8 @@ if (!PDFJS.workerSrc && typeof document !== 'undefined') {
   // workerSrc is not set -- using last script url to define default location
   PDFJS.workerSrc = (function () {
     'use strict';
-    var scriptTagContainer = document.body ||
-                             document.getElementsByTagName('head')[0];
-    var pdfjsSrc = scriptTagContainer.lastChild.src;
-    return pdfjsSrc && pdfjsSrc.replace(/\.js$/i, '.worker.js');
+    var pdfJsSrc = document.currentScript.src;
+    return pdfJsSrc && pdfJsSrc.replace(/\.js$/i, '.worker.js');
   })();
 }
 //#endif
diff --git a/web/compatibility.js b/web/compatibility.js
index 6d91057f1..594c20bcb 100644
--- a/web/compatibility.js
+++ b/web/compatibility.js
@@ -577,3 +577,19 @@ if (typeof PDFJS === 'undefined') {
     PDFJS.disableFullscreen = true;
   }
 })();
+
+// Provides document.currentScript support
+// Support: IE, Chrome<29.
+(function checkCurrentScript() {
+  if ('currentScript' in document) {
+    return;
+  }
+  Object.defineProperty(document, 'currentScript', {
+    get: function () {
+      var scripts = document.getElementsByTagName('script');
+      return scripts[scripts.length - 1];
+    },
+    enumerable: true,
+    configurable: true
+  });
+})();