diff --git a/_data/rules.yml b/_data/rules.yml
index fb3f145..23820f5 100644
--- a/_data/rules.yml
+++ b/_data/rules.yml
@@ -1948,7 +1948,7 @@ groups:
                 for: 1m
               - name: Istio latency 99 percentile
                 description: Istio 1% slowest requests are longer than 1s.
-                query: 'histogram_quantile(0.99, sum(rate(istio_request_duration_milliseconds_bucket[1m])) by (le)) > 1'
+                query: 'histogram_quantile(0.99, sum(rate(istio_request_duration_milliseconds_bucket[1m])) by (destination_canonical_service, destination_workload_namespace, source_canonical_service, source_workload_namespace, le)) > 1'
                 severity: warning
                 for: 1m
               - name: Istio Pilot Duplicate Entry