diff --git a/open-led-race/open-led-race.ino b/open-led-race/open-led-race.ino
index 731a273..6386c76 100644
--- a/open-led-race/open-led-race.ino
+++ b/open-led-race/open-led-race.ino
@@ -399,7 +399,7 @@ bool players_actity(uint8_t numcars ) {
  */
 bool ready_for_demo_mode(void) {
   if(players_actity(race.numcars)){
-    demoMode_delay.start(INACTIVITY_TIMEOUT_DELAY * 1000); // Reset timeout when somebody is using controllers
+    demoMode_delay.start((unsigned long) INACTIVITY_TIMEOUT_DELAY * 1000); // Reset timeout when somebody is using controllers
   }
   return (demoMode_delay.elapsed());
 }