diff --git a/dist/rules/istio/embedded-exporter.yml b/dist/rules/istio/embedded-exporter.yml
index 3f4758f..a0d697b 100644
--- a/dist/rules/istio/embedded-exporter.yml
+++ b/dist/rules/istio/embedded-exporter.yml
@@ -77,7 +77,7 @@ groups:
         description: "Istio average requests execution is longer than 100ms.\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"
 
     - alert: IstioLatency99Percentile
-      expr: 'histogram_quantile(0.99, rate(istio_request_duration_milliseconds_bucket[1m])) > 1'
+      expr: 'histogram_quantile(0.99, sum(rate(istio_request_duration_milliseconds_bucket[1m])) by (le)) > 1'
       for: 1m
       labels:
         severity: warning