diff --git a/gtk/gtknotebook.h b/gtk/gtknotebook.h
index febfa9e3b8..ea700c760f 100644
--- a/gtk/gtknotebook.h
+++ b/gtk/gtknotebook.h
@@ -281,6 +281,9 @@ GDK_AVAILABLE_IN_ALL
 void gtk_notebook_set_tab_detachable      (GtkNotebook *notebook,
 					   GtkWidget   *child,
 					   gboolean     detachable);
+GDK_AVAILABLE_IN_3_16
+void gtk_notebook_detach_tab              (GtkNotebook *notebook,
+                                           GtkWidget   *child);
 
 GDK_AVAILABLE_IN_ALL
 GtkWidget* gtk_notebook_get_action_widget (GtkNotebook *notebook,