diff --git a/include/wx/webrequest_curl.h b/include/wx/webrequest_curl.h
index 6a75b35c53..45f34611e2 100644
--- a/include/wx/webrequest_curl.h
+++ b/include/wx/webrequest_curl.h
@@ -70,6 +70,7 @@ private:
     struct curl_slist *m_headerList;
     wxScopedPtr<wxWebResponseCURL> m_response;
     wxScopedPtr<wxWebAuthChallengeCURL> m_authChallenge;
+    wxFileOffset m_bytesSent;
 
     void DestroyHeaderList();
 
diff --git a/src/common/webrequest_curl.cpp b/src/common/webrequest_curl.cpp
index c4f0ecb6d0..5c1a295c92 100644
--- a/src/common/webrequest_curl.cpp
+++ b/src/common/webrequest_curl.cpp
@@ -227,6 +227,8 @@ void wxWebRequestCURL::Start()
 
 bool wxWebRequestCURL::StartRequest()
 {
+    m_bytesSent = 0;
+
     if ( static_cast<wxWebSessionCURL&>(GetSession()).StartRequest(*this) )
     {
         SetState(State_Active);
@@ -271,7 +273,12 @@ wxString wxWebRequestCURL::GetError() const
 size_t wxWebRequestCURL::ReadData(char* buffer, size_t size)
 {
     if ( m_dataStream )
-        return m_dataStream->Read((void*)buffer, size).LastRead();
+    {
+        m_dataStream->Read((void*)buffer, size);
+        size_t readSize = m_dataStream->LastRead();
+        m_bytesSent += readSize;
+        return readSize;
+    }
     else
         return 0;
 }
@@ -292,14 +299,12 @@ wxWebResponse* wxWebRequestCURL::GetResponse() const
 
 wxFileOffset wxWebRequestCURL::GetBytesSent() const
 {
-    wxFAIL_MSG("not implemented");
-    return 0;
+    return m_bytesSent;
 }
 
 wxFileOffset wxWebRequestCURL::GetBytesExpectedToSend() const
 {
-    wxFAIL_MSG("not implemented");
-    return 0;
+    return m_dataSize;
 }
 
 //