diff --git a/js/boilerplate.js b/js/boilerplate.js
index 5b0e7f5..d5fef32 100644
--- a/js/boilerplate.js
+++ b/js/boilerplate.js
@@ -61,6 +61,7 @@ window.rkt_get_evt_handler = function(event_kind, el_id, selector, win_nr)
               let obj = {evt: event_kind, id: el_id, selector: selector, window: win_nr,
 						 js_evt: window.rkt_event_info(event_kind, el_id, e) };
               window.rkt_put_evt(obj);
+              e.preventDefault();
          }
       };
       window.rkt_bounds.set(handler_key, handler);