diff --git a/src/generic/progdlgg.cpp b/src/generic/progdlgg.cpp
index cad525d1d3..f987808944 100644
--- a/src/generic/progdlgg.cpp
+++ b/src/generic/progdlgg.cpp
@@ -210,8 +210,8 @@ wxProgressDialog::wxProgressDialog(wxString const &title,
 bool
 wxProgressDialog::Update(int value, const wxString& newmsg)
 {
-   wxASSERT_MSG( value == -1 || m_gauge, _T("can't update non existent dialog") );
-   wxASSERT_MSG( value < m_maximum, _T("invalid progress value") );
+   wxASSERT_MSG( value == -1 || m_gauge, _T("cannot update non existent dialog") );
+   wxASSERT_MSG( value <= m_maximum, _T("invalid progress value") );
 
 
    if( m_gauge )
@@ -265,7 +265,7 @@ wxProgressDialog::Update(int value, const wxString& newmsg)
        // so that we return TRUE below
        m_state = Finished;
    }
-
+   wxYield();
    return m_state != Canceled;
 }