diff --git a/docs/reference/gdk/gdk4-sections.txt b/docs/reference/gdk/gdk4-sections.txt
index c3cf29404e..0f41547169 100644
--- a/docs/reference/gdk/gdk4-sections.txt
+++ b/docs/reference/gdk/gdk4-sections.txt
@@ -851,7 +851,6 @@ gdk_x11_window_move_to_current_desktop
 gdk_x11_window_move_to_desktop
 gdk_x11_window_get_desktop
 gdk_x11_window_set_utf8_property
-gdk_x11_window_set_frame_extents
 gdk_x11_window_set_frame_sync_enabled
 gdk_x11_keymap_get_group_for_state
 gdk_x11_keymap_key_is_modifier
diff --git a/gdk/x11/gdkwindow-x11.c b/gdk/x11/gdkwindow-x11.c
index c509cb2073..3fcaae3591 100644
--- a/gdk/x11/gdkwindow-x11.c
+++ b/gdk/x11/gdkwindow-x11.c
@@ -2989,29 +2989,6 @@ gdk_x11_window_set_shadow_width (GdkWindow *window,
                    (guchar *) &data, 4);
 }
 
-/**
- * gdk_x11_window_set_frame_extents:
- * @window: (type GdkX11Window): a #GdkWindow
- * @left: The left extent
- * @right: The right extent
- * @top: The top extent
- * @bottom: The bottom extent
- *
- * This is the same as gdk_window_set_shadow_width() but it only works
- * on GdkX11Window.
- *
- * Deprecated: 3.12: Use gdk_window_set_shadow_width() instead.
- */
-void
-gdk_x11_window_set_frame_extents (GdkWindow *window,
-                                  int        left,
-                                  int        right,
-                                  int        top,
-                                  int        bottom)
-{
-  gdk_x11_window_set_shadow_width (window, left, right, top, bottom);
-}
-
 /**
  * gdk_x11_window_set_theme_variant:
  * @window: (type GdkX11Window): a #GdkWindow
diff --git a/gdk/x11/gdkx11window.h b/gdk/x11/gdkx11window.h
index 46b141b5ea..a9c13189fc 100644
--- a/gdk/x11/gdkx11window.h
+++ b/gdk/x11/gdkx11window.h
@@ -65,12 +65,6 @@ void     gdk_x11_window_set_utf8_property    (GdkWindow *window,
 GDK_AVAILABLE_IN_ALL
 void     gdk_x11_window_set_theme_variant (GdkWindow   *window,
                                            const char  *variant);
-GDK_DEPRECATED_FOR(gdk_window_set_shadow_width)
-void     gdk_x11_window_set_frame_extents (GdkWindow *window,
-                                           int        left,
-                                           int        right,
-                                           int        top,
-                                           int        bottom);
 GDK_AVAILABLE_IN_ALL
 void     gdk_x11_window_move_to_current_desktop (GdkWindow   *window);