diff --git a/include/wx/propgrid/manager.h b/include/wx/propgrid/manager.h
index b707ce9ffd..3cf7766983 100644
--- a/include/wx/propgrid/manager.h
+++ b/include/wx/propgrid/manager.h
@@ -562,8 +562,6 @@ protected:
 
     wxPropertyGridPage*     m_emptyPage;
 
-    wxArrayString   m_columnLabels;
-
     long            m_iFlags;
 
     // Selected page index.