diff --git a/_data/rules.yml b/_data/rules.yml
index 3f29fb0..61425a5 100644
--- a/_data/rules.yml
+++ b/_data/rules.yml
@@ -1785,7 +1785,7 @@ groups:
                 severity: critical
               - name: HAProxy backend max active session
                 description: HAproxy backend {{ $labels.fqdn }}/{{ $labels.backend }} is reaching session limit (> 80%).
-                query: "((sum by (backend) (avg_over_time(haproxy_backend_max_sessions[2m]) * 100) / sum by (backend) (avg_over_time(haproxy_backend_limit_sessions[2m])))) > 80"
+                query: "((sum by (backend) (avg_over_time(haproxy_backend_current_sessions[2m]) * 100) / sum by (backend) (avg_over_time(haproxy_backend_limit_sessions[2m])))) > 80"
                 severity: warning
                 for: 2m
               - name: HAProxy pending requests