diff --git a/charts/matrix-synapse/templates/secrets.yaml b/charts/matrix-synapse/templates/secrets.yaml
index 4b69c56..71b8e3f 100644
--- a/charts/matrix-synapse/templates/secrets.yaml
+++ b/charts/matrix-synapse/templates/secrets.yaml
@@ -70,6 +70,9 @@ stringData:
   {{- else }}
       password: "@@REDIS_PASSWORD@@"
   {{- end }}
+  {{- if $redisPort }}
+      port: {{ $redisPort | quote }}
+  {{- end }}
 {{- end }}
 
     {{- with .Values.extraSecrets }}