diff --git a/gtk/gtknotebook.c b/gtk/gtknotebook.c
index f8457b592d..88835d3e34 100644
--- a/gtk/gtknotebook.c
+++ b/gtk/gtknotebook.c
@@ -332,6 +332,16 @@ static void gtk_notebook_get_preferred_width (GtkWidget        *widget,
 static void gtk_notebook_get_preferred_height(GtkWidget        *widget,
                                               gint             *minimum,
                                               gint             *natural);
+static void gtk_notebook_get_preferred_width_for_height
+                                             (GtkWidget        *widget,
+                                              gint              height,
+                                              gint             *minimum,
+                                              gint             *natural);
+static void gtk_notebook_get_preferred_height_for_width
+                                             (GtkWidget        *widget,
+                                              gint              width,
+                                              gint             *minimum,
+                                              gint             *natural);
 static void gtk_notebook_size_allocate       (GtkWidget        *widget,
                                               GtkAllocation    *allocation);
 static gint gtk_notebook_draw                (GtkWidget        *widget,
@@ -635,6 +645,8 @@ gtk_notebook_class_init (GtkNotebookClass *class)
   widget_class->unrealize = gtk_notebook_unrealize;
   widget_class->get_preferred_width = gtk_notebook_get_preferred_width;
   widget_class->get_preferred_height = gtk_notebook_get_preferred_height;
+  widget_class->get_preferred_width_for_height = gtk_notebook_get_preferred_width_for_height;
+  widget_class->get_preferred_height_for_width = gtk_notebook_get_preferred_height_for_width;
   widget_class->size_allocate = gtk_notebook_size_allocate;
   widget_class->draw = gtk_notebook_draw;
   widget_class->button_press_event = gtk_notebook_button_press;
@@ -2336,6 +2348,23 @@ gtk_notebook_size_request (GtkWidget      *widget,
     }
 }
 
+static void
+gtk_notebook_get_preferred_width_for_height (GtkWidget *widget,
+                                             gint       height,
+                                             gint      *minimum,
+                                             gint      *natural)
+{
+  gtk_notebook_size_request (widget, GTK_ORIENTATION_HORIZONTAL, height, minimum, natural);
+}
+
+static void
+gtk_notebook_get_preferred_height_for_width (GtkWidget *widget,
+                                             gint       width,
+                                             gint      *minimum,
+                                             gint      *natural)
+{
+  gtk_notebook_size_request (widget, GTK_ORIENTATION_VERTICAL, width, minimum, natural);
+}
 
 static void
 gtk_notebook_get_preferred_width (GtkWidget *widget,