diff --git a/assets/js/sections/contesting.js b/assets/js/sections/contesting.js
index 2c02eea3..28d31e05 100644
--- a/assets/js/sections/contesting.js
+++ b/assets/js/sections/contesting.js
@@ -20,6 +20,8 @@ function reset_contest_session() {
     $("#callsign").focus();
     setRst($("#mode").val());
 
+    $("#serial").prop("checked", true);
+
     localStorage.removeItem("contestid");
     localStorage.removeItem("exchangetype");
     localStorage.removeItem("exchangesent");