diff --git a/src/generic/progdlgg.cpp b/src/generic/progdlgg.cpp
index 7b96482cd2..0633b59e44 100644
--- a/src/generic/progdlgg.cpp
+++ b/src/generic/progdlgg.cpp
@@ -313,9 +313,11 @@ wxProgressDialog::Update(int value, const wxString& newmsg)
 
     wxASSERT_MSG( value <= m_maximum, wxT("invalid progress value") );
 
-    if ( m_gauge && value < m_maximum )
+    // fill up the gauge if value == maximum because this means that the dialog
+    // is going to close and the gauge shouldn't be partly empty in this case
+    if ( m_gauge && value <= m_maximum )
     {
-        m_gauge->SetValue(value + 1);
+        m_gauge->SetValue(value == maximum ? value : value + 1);
     }
 
     if ( !newmsg.IsEmpty() )