diff --git a/examples/config-sample.yaml b/examples/config-sample.yaml
index e041b89..e866e45 100644
--- a/examples/config-sample.yaml
+++ b/examples/config-sample.yaml
@@ -7,7 +7,10 @@ address: "0.0.0.0"
 # The listening port
 #
 port: "8000"
-
+#
+# The prefix path of the server. Default none
+#
+#prefix: "/"
 
 # ---------------------------- Transport security ------------------------------
 #tls: