diff --git a/src/mac/carbon/listbox.cpp b/src/mac/carbon/listbox.cpp
index 1a50bd9dc7..a837c5f17d 100644
--- a/src/mac/carbon/listbox.cpp
+++ b/src/mac/carbon/listbox.cpp
@@ -537,7 +537,7 @@ wxMacDataBrowserListControl::wxMacDataBrowserListControl( wxWindow *peer, const
     }
     else if ( style & wxLB_EXTENDED )
     {
-        // default behaviour
+        options |= kDataBrowserCmdTogglesSelection;
     }
     else
     {