diff --git a/geomagio/processing/obsrio.py b/geomagio/processing/obsrio.py
index bccff9a648a900b8c394d9b353e8e947710f53cb..cbe7ea8c3118fdbf5ec5d5634f59bb7b9db3993b 100644
--- a/geomagio/processing/obsrio.py
+++ b/geomagio/processing/obsrio.py
@@ -73,6 +73,7 @@ def obsrio_temperatures(
     observatory: str,
     input_factory: Optional[TimeseriesFactory] = None,
     output_factory: Optional[TimeseriesFactory] = None,
+    realtime_interval: int = 600,
     update_limit: int = 10,
 ):
     """Filter temperatures 1Hz miniseed (LK1-4) to 1 minute legacy (UK1-4)."""