diff --git a/airbyte-integrations/connectors/source-klaviyo/source_klaviyo/source.py b/airbyte-integrations/connectors/source-klaviyo/source_klaviyo/source.py
index 4d486789c70ad7..96dd228f34524c 100644
--- a/airbyte-integrations/connectors/source-klaviyo/source_klaviyo/source.py
+++ b/airbyte-integrations/connectors/source-klaviyo/source_klaviyo/source.py
@@ -31,7 +31,7 @@ def streams(self, config: Mapping[str, Any]) -> List[Stream]:
         """
         api_key = config["api_key"]
         start_date = config["start_date"]
-        events_look_back_window = config["events_look_back_window"]
+        events_look_back_window = config.get("events_look_back_window", 0)
         return [
             Campaigns(api_key=api_key),
             Events(api_key=api_key, start_date=start_date, events_look_back_window=events_look_back_window),