diff --git a/charts/alertmanager/templates/statefulset.yaml b/charts/alertmanager/templates/statefulset.yaml
index 2bdafc86db2a..960604ce102a 100644
--- a/charts/alertmanager/templates/statefulset.yaml
+++ b/charts/alertmanager/templates/statefulset.yaml
@@ -154,7 +154,7 @@ spec:
             - --config.file=/etc/alertmanager/alertmanager.yml
             {{- end }}
             {{- if or (gt (int .Values.replicaCount) 1) (.Values.additionalPeers) }}
-            - --cluster.advertise-address=[$(POD_IP)]:{{ $svcClusterPort }}
+            - --cluster.advertise-address=$(POD_IP):{{ $svcClusterPort }}
             - --cluster.listen-address=0.0.0.0:{{ $svcClusterPort }}
             {{- end }}
             {{- if gt (int .Values.replicaCount) 1}}