diff --git a/direwolf/direwolf-transmit-dtmf-aprs.conf b/direwolf/direwolf-transmit-dtmf-aprs.conf
index f19ee5af..6e6e76ea 100644
--- a/direwolf/direwolf-transmit-dtmf-aprs.conf
+++ b/direwolf/direwolf-transmit-dtmf-aprs.conf
@@ -1,3 +1,4 @@
+CHANNEL 0
 MYCALL AMSAT
 ADEVICE hw:CARD=Device,DEV=0 hw:CARD=Headphones,DEV=0 
 DTMF