diff --git a/src/gnome-shell-plugin.c b/src/gnome-shell-plugin.c
index 05d09af9d..acd022a1c 100644
--- a/src/gnome-shell-plugin.c
+++ b/src/gnome-shell-plugin.c
@@ -45,8 +45,8 @@ static void gnome_shell_plugin_unminimize       (MetaPlugin          *plugin,
 static void gnome_shell_plugin_size_change      (MetaPlugin          *plugin,
                                                  MetaWindowActor     *actor,
                                                  MetaSizeChange       which_change,
-                                                 MetaRectangle       *old_rect,
-                                                 MetaRectangle       *new_rect);
+                                                 MetaRectangle       *old_frame_rect,
+                                                 MetaRectangle       *old_buffer_rect);
 static void gnome_shell_plugin_map              (MetaPlugin          *plugin,
                                                  MetaWindowActor     *actor);
 static void gnome_shell_plugin_destroy          (MetaPlugin          *plugin,
diff --git a/src/shell-wm-private.h b/src/shell-wm-private.h
index f9c6aa940..5b4089ad9 100644
--- a/src/shell-wm-private.h
+++ b/src/shell-wm-private.h
@@ -15,8 +15,8 @@ void _shell_wm_unminimize (ShellWM         *wm,
 void _shell_wm_size_change(ShellWM         *wm,
                            MetaWindowActor *actor,
                            MetaSizeChange   which_change,
-                           MetaRectangle   *old_rect,
-                           MetaRectangle   *new_rect);
+                           MetaRectangle   *old_frame_rect,
+                           MetaRectangle   *old_buffer_rect);
 void _shell_wm_map        (ShellWM         *wm,
                            MetaWindowActor *actor);
 void _shell_wm_destroy    (ShellWM         *wm,