diff --git a/plugin-server/src/worker/ingestion/timestamps.ts b/plugin-server/src/worker/ingestion/timestamps.ts
index 3cfb3097aa2566..1f3bb759a7ecfd 100644
--- a/plugin-server/src/worker/ingestion/timestamps.ts
+++ b/plugin-server/src/worker/ingestion/timestamps.ts
@@ -45,7 +45,7 @@ export function parseEventTimestamp(data: PluginEvent, callback?: IngestionWarni
         parsedTs = now
     }
 
-    if (!parsedTs.isValid) {
+    if (!parsedTs.isValid || parsedTs.year < 0) {
         callback?.('ignored_invalid_timestamp', {
             eventUuid: data['uuid'] ?? '',
             field: 'timestamp',