diff --git a/ansible/roles/traffic-engine/files/helm/conf/sapp.toml b/ansible/roles/traffic-engine/files/helm/conf/sapp.toml
index 869d7bc5..d5aea569 100644
--- a/ansible/roles/traffic-engine/files/helm/conf/sapp.toml
+++ b/ansible/roles/traffic-engine/files/helm/conf/sapp.toml
@@ -93,7 +93,7 @@ bypass_trigger_cpu_usage={{ .Values.overload_protection.detect_threshold_cpu_usa
 ### note, unit of get_cpu_usage_interval is milliseconds(ms)
     get_cpu_usage_interval={{ .Values.overload_protection.detect_interval_in_ms }}
 ### note, use the average of the last $smooth_avg_window times as current realtime value
-    smooth_avg_window={{ .Values.overload_protection.detect_interval_in_ms }}
+    smooth_avg_window={{ .Values.overload_protection.detect_smooth_avg_window }}
 
     decrease_ratio="0.95"
     increase_ratio="1.005"