diff --git a/wxPython/src/_notebook.i b/wxPython/src/_notebook.i
index dff56eeefa..395720b69f 100644
--- a/wxPython/src/_notebook.i
+++ b/wxPython/src/_notebook.i
@@ -193,11 +193,18 @@ enum {
     wxNB_NOPAGETHEME,
 
     // hittest flags
-    wxNB_HITTEST_NOWHERE = 1,   // not on tab
-    wxNB_HITTEST_ONICON  = 2,   // on icon
-    wxNB_HITTEST_ONLABEL = 4,   // on label
-    wxNB_HITTEST_ONITEM  = wxNB_HITTEST_ONICON | wxNB_HITTEST_ONLABEL,
-    wxNB_HITTEST_ONPAGE = 8
+    wxBK_HITTEST_NOWHERE = 1,   // not on tab
+    wxBK_HITTEST_ONICON  = 2,   // on icon
+    wxBK_HITTEST_ONLABEL = 4,   // on label
+    wxBK_HITTEST_ONITEM  = wxBK_HITTEST_ONICON | wxBK_HITTEST_ONLABEL,
+    wxBK_HITTEST_ONPAGE  = 8,   // not on tab control, but over the selected page
+
+    // for backwards compatibility only
+    wxNB_HITTEST_NOWHERE,
+    wxNB_HITTEST_ONICON,
+    wxNB_HITTEST_ONLABEL,
+    wxNB_HITTEST_ONITEM,
+    wxNB_HITTEST_ONPAGE,
 };