diff --git a/operations/mimir-mixin/alerts/ingest-storage.libsonnet b/operations/mimir-mixin/alerts/ingest-storage.libsonnet
index 61beec8bf2..812889702e 100644
--- a/operations/mimir-mixin/alerts/ingest-storage.libsonnet
+++ b/operations/mimir-mixin/alerts/ingest-storage.libsonnet
@@ -238,10 +238,14 @@ local utils = import 'mixin-utils/utils.libsonnet';
           alert: $.alertName('StrongConsistencyOffsetMissing'),
           'for': '5m',
           expr: |||
-            sum by (%(alert_aggregation_labels)s) (rate(cortex_ingest_storage_strong_consistency_requests_total{component="partition-reader", with_offset="false"}[%(range)s]))
-            /
-            sum by (%(alert_aggregation_labels)s) (rate(cortex_ingest_storage_strong_consistency_requests_total{component="partition-reader"}[%(range)s]))
-            * 100 > 5
+            (
+              sum by (%(alert_aggregation_labels)s) (rate(cortex_ingest_storage_strong_consistency_requests_total{component="partition-reader", with_offset="false"}[%(range)s]))
+              /
+              sum by (%(alert_aggregation_labels)s) (rate(cortex_ingest_storage_strong_consistency_requests_total{component="partition-reader"}[%(range)s]))
+              * 100 > 5
+            )
+            and
+            sum by (%(alert_aggregation_labels)s) (rate(cortex_ingest_storage_strong_consistency_requests_total{component="partition-reader"}[%(range)s])) > 0
           ||| % {
             alert_aggregation_labels: $._config.alert_aggregation_labels,
             range: $.rateInterval('1m'),