diff --git a/opencontrail/files/4.0/server.properties b/opencontrail/files/4.0/server.properties
index a8ff61b..5560f5c 100644
--- a/opencontrail/files/4.0/server.properties
+++ b/opencontrail/files/4.0/server.properties
@@ -123,3 +123,6 @@
 log.cleaner.dedupe.buffer.size=250000000
 
 delete.topic.enable=true
+
+default.replication.factor={% if database.members|length>1 %}2{% else %}1{% endif %}
+