diff --git a/src/gtk/combobox.cpp b/src/gtk/combobox.cpp
index 69c1373dde..fe74ecbd95 100644
--- a/src/gtk/combobox.cpp
+++ b/src/gtk/combobox.cpp
@@ -352,11 +352,19 @@ void wxComboBox::OnUpdateSelectAll(wxUpdateUIEvent& event)
 
 void wxComboBox::Popup()
 {
-     gtk_combo_box_popup( GTK_COMBO_BOX(m_widget) );
+    gtk_combo_box_popup( GTK_COMBO_BOX(m_widget) );
+
+    wxCommandEvent event( wxEVT_COMMAND_COMBOBOX_DROPDOWN, GetId() );
+    event.SetEventObject( this );
+    HandleWindowEvent( event );
 }
 
 void wxComboBox::Dismiss()
 {
     gtk_combo_box_popdown( GTK_COMBO_BOX(m_widget) );
+
+    wxCommandEvent event( wxEVT_COMMAND_COMBOBOX_CLOSEUP, GetId() );
+    event.SetEventObject( this );
+    HandleWindowEvent( event );
 }
 #endif // wxUSE_COMBOBOX