diff --git a/etc/rtpengine.sample.conf b/etc/rtpengine.sample.conf
index 1ec88983e..e96464fd6 100644
--- a/etc/rtpengine.sample.conf
+++ b/etc/rtpengine.sample.conf
@@ -18,6 +18,9 @@ listen-ng = 127.0.0.1:2223
 # listen-tcp = 25060
 # listen-udp = 12222
 
+### interface for HTTP, WS and Prometheus
+# listen-http = 9101
+
 timeout = 60
 silent-timeout = 3600
 tos = 184