diff --git a/wxPython/wx/lib/flatnotebook.py b/wxPython/wx/lib/flatnotebook.py
index 309214c282..a58bed1d2a 100644
--- a/wxPython/wx/lib/flatnotebook.py
+++ b/wxPython/wx/lib/flatnotebook.py
@@ -4381,7 +4381,7 @@ class PageContainer(wx.Panel):
                            
         elif self.GetParent().GetWindowStyleFlag() & FNB_ALLOW_FOREIGN_DND:
         
-            if wx.Platform in ["__WXMSW__", "__WXGTK__"]:
+            if wx.Platform in ["__WXMSW__", "__WXGTK__", "__WXMAC__"]:
                 if nTabPage >= 0:
                 
                     window = oldNotebook.GetPage(nTabPage)