diff --git a/overlay_interface.c b/overlay_interface.c
index 83001591..6a144572 100644
--- a/overlay_interface.c
+++ b/overlay_interface.c
@@ -670,7 +670,9 @@ overlay_broadcast_ensemble(int interface_number,
     return WHYF("Cannot send to interface %s as it is down", interface->name);
   }
 
-  if (interface->fileP)
+  if (interface->type==OVERLAY_INTERFACE_PACKETRADIO) {
+    return overlay_packetradio_tx_packet(interface_number,recipientaddr,bytes,len);
+  } else if (interface->fileP)
     {
       
       struct dummy_packet packet={
diff --git a/overlay_packetradio.c b/overlay_packetradio.c
index 19887683..e2b34880 100644
--- a/overlay_packetradio.c
+++ b/overlay_packetradio.c
@@ -16,6 +16,9 @@
 int overlay_packetradio_setup_port(overlay_interface *interface)
 {
   struct termios t;
+
+  set_nonblock(interface->alarm.poll.fd);
+
   tcgetattr(interface->alarm.poll.fd, &t);
   // XXX Speed and options should be configurable
   cfsetispeed(&t, B57600);
@@ -40,6 +43,7 @@ int overlay_packetradio_setup_port(overlay_interface *interface)
   t.c_oflag &= ~OPOST;
 
   tcsetattr(interface->alarm.poll.fd, TCSANOW, &t);
+
   return 0;
 }
 
@@ -166,3 +170,11 @@ void overlay_packetradio_poll(struct sched_ent *alarm)
   return ;
 }
 
+int overlay_packetradio_tx_packet(int interface_number,
+				  struct sockaddr_in *recipientaddr,
+				  unsigned char *bytes,int len)
+{
+  if (config.debug.packetradio) DEBUGF("Sending packet of %d bytes",len);
+  return 0;
+}
+
diff --git a/serval.h b/serval.h
index 2eaa2fe8..22bace12 100644
--- a/serval.h
+++ b/serval.h
@@ -753,6 +753,9 @@ int fd_poll();
 void overlay_interface_discover(struct sched_ent *alarm);
 void overlay_packetradio_poll(struct sched_ent *alarm);
 int overlay_packetradio_setup_port(overlay_interface *interface);
+int overlay_packetradio_tx_packet(int interface_number,
+				  struct sockaddr_in *recipientaddr,
+				  unsigned char *bytes,int len);
 void overlay_dummy_poll(struct sched_ent *alarm);
 void overlay_route_tick(struct sched_ent *alarm);
 void server_config_reload(struct sched_ent *alarm);