diff --git a/include/wx/gtk/filedlg.h b/include/wx/gtk/filedlg.h
index c448dbb3bd..31b895da18 100644
--- a/include/wx/gtk/filedlg.h
+++ b/include/wx/gtk/filedlg.h
@@ -56,6 +56,13 @@ public:
 //private:
     bool m_destroyed_by_delete;
 
+    // override this from wxTLW since the native
+    // form doesn't have any m_wxwindow
+    virtual void DoSetSize(int x, int y,
+                           int width, int height,
+                           int sizeFlags = wxSIZE_AUTO);
+
+
 private:
     DECLARE_DYNAMIC_CLASS(wxFileDialog)
     DECLARE_EVENT_TABLE()
diff --git a/include/wx/gtk1/filedlg.h b/include/wx/gtk1/filedlg.h
index c448dbb3bd..31b895da18 100644
--- a/include/wx/gtk1/filedlg.h
+++ b/include/wx/gtk1/filedlg.h
@@ -56,6 +56,13 @@ public:
 //private:
     bool m_destroyed_by_delete;
 
+    // override this from wxTLW since the native
+    // form doesn't have any m_wxwindow
+    virtual void DoSetSize(int x, int y,
+                           int width, int height,
+                           int sizeFlags = wxSIZE_AUTO);
+
+
 private:
     DECLARE_DYNAMIC_CLASS(wxFileDialog)
     DECLARE_EVENT_TABLE()
diff --git a/src/gtk/filedlg.cpp b/src/gtk/filedlg.cpp
index 61925cde04..04040bd548 100644
--- a/src/gtk/filedlg.cpp
+++ b/src/gtk/filedlg.cpp
@@ -267,6 +267,14 @@ bool wxFileDialog::Show( bool show )
         return wxGenericFileDialog::Show( show );
 }
 
+void wxFileDialog::DoSetSize(int x, int y, int width, int height, int sizeFlags )
+{
+    if (!m_wxwindow)
+        return;
+    else
+        wxGenericFileDialog::DoSetSize( x, y, width, height, sizeFlags );
+}
+
 wxString wxFileDialog::GetPath() const
 {
 #ifdef __WXGTK24__
diff --git a/src/gtk1/filedlg.cpp b/src/gtk1/filedlg.cpp
index 61925cde04..04040bd548 100644
--- a/src/gtk1/filedlg.cpp
+++ b/src/gtk1/filedlg.cpp
@@ -267,6 +267,14 @@ bool wxFileDialog::Show( bool show )
         return wxGenericFileDialog::Show( show );
 }
 
+void wxFileDialog::DoSetSize(int x, int y, int width, int height, int sizeFlags )
+{
+    if (!m_wxwindow)
+        return;
+    else
+        wxGenericFileDialog::DoSetSize( x, y, width, height, sizeFlags );
+}
+
 wxString wxFileDialog::GetPath() const
 {
 #ifdef __WXGTK24__