diff --git a/etc/rtpengine.conf b/etc/rtpengine.conf
index 1ec8898..1f2cd27 100644
--- a/etc/rtpengine.conf
+++ b/etc/rtpengine.conf
@@ -6,7 +6,7 @@ table = 0
 # table = -1
 
 ### a single interface:
-# interface = 123.234.345.456
+interface = lo
 ### separate multiple interfaces with semicolons:
 # interface = internal/12.23.34.45;external/23.34.45.54
 ### for different advertised address: