diff --git a/JetHerald/Controllers/HeartbeatController.cs b/JetHerald/Controllers/HeartbeatController.cs
index 9bdbb6b..9224ce5 100644
--- a/JetHerald/Controllers/HeartbeatController.cs
+++ b/JetHerald/Controllers/HeartbeatController.cs
@@ -76,8 +76,8 @@ public class HeartbeatController : ControllerBase
 
         var affected = await Db.ReportHeartbeat(t.TopicId, heart, args.ExpiryTimeout);
 
-        if (affected == 1)
-            await Herald.BroadcastMessageRaw(t.TopicId, $"!{t.Description}!:\nHeart \"{heart}\" has started beating at {DateTime.UtcNow:0}");
+        if (affected == 0)
+            await Herald.BroadcastMessageRaw(t.TopicId, $"!{t.Description}!:\nHeart \"{heart}\" has started beating at {DateTime.UtcNow:O}");
 
         Timeouts.ApplyCost(t.TopicId, Config.HeartbeatCost);