diff --git a/src/font-view-window.c b/src/font-view-window.c
index 1352ab3..334e082 100644
--- a/src/font-view-window.c
+++ b/src/font-view-window.c
@@ -768,8 +768,9 @@ font_view_window_show_overview (FontViewWindow *self)
 }
 
 static void
-action_toggle_search_cb (FontViewWindow *self)
+action_toggle_search_cb (GtkWidget *widget, const char *action_name, GVariant *parameter)
 {
+ FontViewWindow *self = FONT_VIEW_WINDOW(widget);
 
  gtk_toggle_button_set_active (self->search_button,
                                !gtk_toggle_button_get_active (self->search_button));