--- a/gtk/gtkrange.c	2011-01-15 13:19:14 +0800
+++ b/gtk/gtkrange.c	2011-01-31 11:20:51 +0800
@@ -3970,7 +3970,7 @@
  *
  * Since: 2.24
  */
-gtk_range_set_round_digits (GtkRange *range,
+void gtk_range_set_round_digits (GtkRange *range,
                             gint      round_digits)
 {
   g_return_if_fail (GTK_IS_RANGE (range));
