diff --git a/www/js/interface.js b/www/js/interface.js
index 56fff9a..65c3a0b 100644
--- a/www/js/interface.js
+++ b/www/js/interface.js
@@ -916,6 +916,7 @@ const INTERFACE = {
     },
 
     replay_jump(turn) {
+        turn = +turn;
         if(INTERFACE_DATA.mode == INTERFACE.Mode.Replay) {
             if(turn >= 0 && turn <= INTERFACE_DATA.history.length) {
                 INTERFACE_DATA.replay_turn = turn;