diff --git a/scouter/activities/gates.py b/scouter/activities/gates.py
index 3db376b..fbdb5e0 100644
--- a/scouter/activities/gates.py
+++ b/scouter/activities/gates.py
@@ -93,7 +93,7 @@ class Gates(BaseActivity):
             for (tag, name), group in grouped:
                 # Get the aggregation function from model_tags
                 aggr_function = input_data['model_tags'].get(
-                    name, {}).get('aggr_function', 'lts')
+                    name, {}).get('aggr_func', 'lts')
 
                 group.sort_values(by='timestamp', inplace=True)