diff --git a/tester/flexisip.conf b/tester/flexisip.conf
index 48f4a054b..c4b2a5894 100755
--- a/tester/flexisip.conf
+++ b/tester/flexisip.conf
@@ -432,6 +432,10 @@ sdp-port-range-max=65535
 #  Default value: 1
 #h264-iframe-decim=1
 
+# Sends a ACK and BYE to 200 Ok for INVITEs not belonging to any established call.
+bye-orphan-dialogs=true
+
+
 ##
 ## The purpose of the Transcoder module is to transparently transcode
 ## from one audio codec to another to make the communication possible