diff --git a/direwolf/direwolf-pacsatsim-jp14-loop.conf b/direwolf/direwolf-pacsatsim-jp14-loop.conf
index 6b1b9b34..b2a5fb9e 100644
--- a/direwolf/direwolf-pacsatsim-jp14-loop.conf
+++ b/direwolf/direwolf-pacsatsim-jp14-loop.conf
@@ -1,5 +1,5 @@
 ADEVICE plughw:CARD=Device,DEV=0 plughw:CARD=Loopback,DEV=0
-#PTT GPIO 20  
+PTT GPIO -20  
 MYCALL AMSAT-12
 CHANNEL 0
 MODEM 1200
diff --git a/direwolf/direwolf-pacsatsim-jp14.conf b/direwolf/direwolf-pacsatsim-jp14.conf
index 36891485..da583428 100644
--- a/direwolf/direwolf-pacsatsim-jp14.conf
+++ b/direwolf/direwolf-pacsatsim-jp14.conf
@@ -1,5 +1,5 @@
 ADEVICE plughw:CARD=Device,DEV=0 plughw:CARD=Device,DEV=0
-#PTT GPIO 20  
+PTT GPIO -20  
 MYCALL AMSAT-12
 CHANNEL 0
 MODEM 1200
diff --git a/direwolf/direwolf-pacsatsim-loopback.conf b/direwolf/direwolf-pacsatsim-loopback.conf
index d1bcf78d..e96bd980 100644
--- a/direwolf/direwolf-pacsatsim-loopback.conf
+++ b/direwolf/direwolf-pacsatsim-loopback.conf
@@ -1,5 +1,5 @@
 ADEVICE plughw:CARD=Loopback,DEV=1 plughw:CARD=Loopback,DEV=1
-#PTT GPIO 20  
+PTT GPIO -20  
 MYCALL AMSAT-12
 CHANNEL 0
 MODEM 1200