--- /dev/null
+#ifndef HYPERLINK_H
+#define HYPERLINK_H
+
+#include <glib.h>
+#include <gtk/gtk.h>
+
+#include "glk.h"
+#include "window.h"
+#include "event.h"
+
+G_GNUC_INTERNAL gboolean on_window_button_release_event(GtkWidget *widget, GdkEventButton *event, winid_t win);
+
+#endif