diff --git a/src/shared/util.js b/src/shared/util.js
index e471b8c73..f94491d88 100644
--- a/src/shared/util.js
+++ b/src/shared/util.js
@@ -489,7 +489,7 @@ var Util = PDFJS.Util = (function UtilClosure() {
     var loaded = false;
     script.setAttribute('src', src);
     if (callback) {
-      script.onreadystatechange = script.onload = function() {
+      script.onload = function() {
         if (!loaded) {
           callback();
         }
diff --git a/web/pdf_history.js b/web/pdf_history.js
index 51c5cd9bd..7607770e1 100644
--- a/web/pdf_history.js
+++ b/web/pdf_history.js
@@ -65,7 +65,7 @@ var PDFHistory = {
         // is opened in the web viewer.
         this.reInitialized = true;
       }
-      window.history.replaceState({ fingerprint: this.fingerprint }, '', '');
+      window.history.replaceState({ fingerprint: this.fingerprint }, '');
     }
 
     var self = this;
@@ -270,9 +270,9 @@ var PDFHistory = {
       }
     }
     if (overwrite || this.uid === 0) {
-      window.history.replaceState(this._stateObj(params), '', '');
+      window.history.replaceState(this._stateObj(params), '');
     } else {
-      window.history.pushState(this._stateObj(params), '', '');
+      window.history.pushState(this._stateObj(params), '');
     }
     this.currentUid = this.uid++;
     this.current = params;