diff --git a/channels/chan_vpb.cc b/channels/chan_vpb.cc
index 87342b1d020ba756cabb52256255cf3e540b7218..d7e9732e0bc9ef2dbddf24b7d259f5bb59dd8cfa 100644
--- a/channels/chan_vpb.cc
+++ b/channels/chan_vpb.cc
@@ -365,6 +365,7 @@ static struct ast_channel_tech vpb_tech = {
 	capabilities: NULL,
 	properties: 0,
 	requester: vpb_request,
+	requester_with_stream_topology: NULL,
 	devicestate: NULL,
 	presencestate: NULL,
 	send_digit_begin: vpb_digit_begin,
@@ -398,6 +399,7 @@ static struct ast_channel_tech vpb_tech_indicate = {
 	capabilities: NULL,
 	properties: 0,
 	requester: vpb_request,
+	requester_with_stream_topology: NULL,
 	devicestate: NULL,
 	presencestate: NULL,
 	send_digit_begin: vpb_digit_begin,