diff --git a/packages/core/neocyclist.mjs b/packages/core/neocyclist.mjs
index 278ddc8a..4600d0ef 100644
--- a/packages/core/neocyclist.mjs
+++ b/packages/core/neocyclist.mjs
@@ -12,6 +12,7 @@ export class NeoCyclist {
     this.cps = 0.5;
     this.lastTick = 0; // absolute time when last tick (clock callback) happened
     this.getTime = getTime; // get absolute time
+    this.time_at_last_tick_message = 0;
 
     this.num_cycles_at_cps_change = 0;
     this.onToggle = onToggle;