diff --git a/src/networkaccessmanager.cpp b/src/networkaccessmanager.cpp
index 8c154686..a57a7ff1 100644
--- a/src/networkaccessmanager.cpp
+++ b/src/networkaccessmanager.cpp
@@ -90,10 +90,11 @@ void JsNetworkRequest::abort()
 }
 
 
-void JsNetworkRequest::changeUrl(const QString& url)
+void JsNetworkRequest::changeUrl(const QString& address)
 {
     if (m_networkRequest) {
-        m_networkRequest->setUrl(QUrl(url));
+        QUrl url = QUrl::fromEncoded(QByteArray(address.toAscii()));
+        m_networkRequest->setUrl(url);
     }
 }
 
diff --git a/test/webpage-spec.js b/test/webpage-spec.js
index ccb986d8..7ebf5213 100644
--- a/test/webpage-spec.js
+++ b/test/webpage-spec.js
@@ -1151,6 +1151,41 @@ describe("WebPage object", function() {
         });
     });
 
+
+    it("should change a url request with an encoded query string", function() {
+        var page = new require('webpage').create();
+
+        var server = require('webserver').create();
+        server.listen(12345, function(request, response) {
+            // echo received request headers in response body
+            response.write(JSON.stringify(request.headers));
+            response.close();
+        });
+
+        var url = "http://localhost:12345/cdn-cgi/pe/bag?r%5B%5D=http%3A%2F%2Fwww.example.org%2Fcdn-cgi%2Fnexp%2Fabv%3D927102467%2Fapps%2Fabetterbrowser.js";
+
+        var handled = false;
+        runs(function() {
+            expect(handled).toEqual(false);
+
+            page.onResourceRequested = function(requestData, request) {
+                request.changeUrl(requestData.url);
+            };
+
+           page.onResourceReceived = function(data) {
+                if (data['stage'] === 'end') {
+                    expect(data.url).toEqual(url);
+                }
+           };
+
+           page.open(url, function (status) {
+                expect(status == 'success').toEqual(true);
+                    handled = true;
+                });
+        });
+    });
+
+
     it('should able to abort a network request', function() {
         var page = require('webpage').create();
         var url = 'http://phantomjs.org';