diff --git a/numalogic/udfs/tools.py b/numalogic/udfs/tools.py
index b5541db4..83075f59 100644
--- a/numalogic/udfs/tools.py
+++ b/numalogic/udfs/tools.py
@@ -295,7 +295,7 @@ def ack_insufficient_data(self, key: KEYS, uuid: str, train_records: int) -> boo
                 key=key,
             )
             return False
-        _struct_log.debug("Acknowledging insufficient data for the key", uuid, key)
+        _struct_log.debug("Acknowledging insufficient data for the key", uuid=uuid, key=key)
         return True
 
     def ack_read(