diff --git a/monitoring/mongodb/alerts.yaml b/monitoring/mongodb/alerts.yaml
index eb9eccd16..f5acde22f 100644
--- a/monitoring/mongodb/alerts.yaml
+++ b/monitoring/mongodb/alerts.yaml
@@ -183,7 +183,7 @@ groups:
 
   - alert: MongoDbRSNotSynced
     expr: |
-      avg by(rs_nm)(count by (rs_nm, pod)(mongodb_rs_members_state{namespace="${namespace}", pod=~"${service}.*", member_state="SECONDARY"})) != (${replicas} - 1) 
+      floor(avg by(rs_nm)(count by (rs_nm, pod)(mongodb_rs_members_state{namespace="${namespace}", pod=~"${service}.*", member_state="SECONDARY"}))) != (${replicas} - 1) 
     for: 10m
     labels:
       severity: warning