diff --git a/charts/cloudnative-pg/values.yaml b/charts/cloudnative-pg/values.yaml
index cbba75053b..1dc0cf9bb4 100644
--- a/charts/cloudnative-pg/values.yaml
+++ b/charts/cloudnative-pg/values.yaml
@@ -271,7 +271,7 @@ monitoringQueriesConfigMap:
          AND blocking_locks.objsubid IS NOT DISTINCT FROM blocked_locks.objsubid
          AND blocking_locks.pid != blocked_locks.pid
        JOIN pg_catalog.pg_stat_activity blocking_activity ON blocking_activity.pid = blocking_locks.pid
-       WHERE NOT blocked_locks.granted
+       WHERE NOT blocked_locks.granted AND blocking_locks.granted
       metrics:
         - total:
             usage: "GAUGE"