diff --git a/conf/byzer.properties.all-in-one.example b/conf/byzer.properties.all-in-one.example
index a0cf9fe77..eb69dcf81 100644
--- a/conf/byzer.properties.all-in-one.example
+++ b/conf/byzer.properties.all-in-one.example
@@ -1,5 +1,7 @@
 # override example for all-in-one package
 
+byzer.server.mode=all-in-one
+
 streaming.master=local[*]
 streaming.name=Byzer-lang-desktop
 streaming.rest=true
diff --git a/conf/byzer.properties.server.example b/conf/byzer.properties.server.example
index b32bf368b..69609246c 100644
--- a/conf/byzer.properties.server.example
+++ b/conf/byzer.properties.server.example
@@ -1,5 +1,7 @@
 # override example for server package
 
+byzer.server.mode=server
+
 streaming.master=local[*]
 streaming.name=Byzer-lang-server
 streaming.rest=true