diff --git a/gdk/gdkinternals.h b/gdk/gdkinternals.h
index dbf56a541c..34e07986b6 100644
--- a/gdk/gdkinternals.h
+++ b/gdk/gdkinternals.h
@@ -142,7 +142,6 @@ struct _GdkSurface
 
   GdkSurfaceImpl *impl; /* window-system-specific delegate object */
 
-  GdkSurface *parent;
   GdkSurface *transient_for;
 
   gpointer widget;