diff --git a/dist/rules/haproxy/haproxy-exporter-v1.yml b/dist/rules/haproxy/haproxy-exporter-v1.yml
index e01360d..76da6fd 100644
--- a/dist/rules/haproxy/haproxy-exporter-v1.yml
+++ b/dist/rules/haproxy/haproxy-exporter-v1.yml
@@ -41,7 +41,7 @@ groups:
         description: "Too many HTTP requests with status 4xx (> 5%) on server {{ $labels.server }}\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"
 
     - alert: HaproxyHighHttp5xxErrorRateServer
-      expr: 'sum by (server) (rate(haproxy_server_http_responses_total{code="5xx"}[1m])) / sum by (server) (rate(haproxy_server_http_responses_total[1m]) * 100) > 5'
+      expr: 'sum by (server) (rate(haproxy_server_http_responses_total{code="5xx"}[1m]) * 100) / sum by (server) (rate(haproxy_server_http_responses_total[1m])) > 5'
       for: 1m
       labels:
         severity: critical