diff --git a/docs/latex/wx/app.tex b/docs/latex/wx/app.tex
index 2add770cd4..ec2ac10d7f 100644
--- a/docs/latex/wx/app.tex
+++ b/docs/latex/wx/app.tex
@@ -134,7 +134,7 @@ otherwise.
 
 \membersection{wxApp::GetTopWindow}\label{wxappgettopwindow}
 
-\constfunc{wxWindow *}{GetTopWindow}{\void}
+\constfunc{virtual wxWindow *}{GetTopWindow}{\void}
 
 Returns a pointer to the top window.
 
diff --git a/include/wx/app.h b/include/wx/app.h
index 6f4ddd3265..d1825f18a6 100644
--- a/include/wx/app.h
+++ b/include/wx/app.h
@@ -171,7 +171,7 @@ public:
         // return the "main" top level window (if it hadn't been set previously
         // with SetTopWindow(), will return just some top level window and, if
         // there are none, will return NULL)
-    wxWindow *GetTopWindow() const
+    virtual wxWindow *GetTopWindow() const
     {
         if (m_topWindow)
             return m_topWindow;