diff --git a/platformio.ini b/platformio.ini
index 50d381c8b..78da2c6e1 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -9,7 +9,7 @@
 ; https://docs.platformio.org/page/projectconf.html
 
 [platformio]
-default_envs = tbeam # lora-relay-v1 # nrf52840dk-geeksville # linux # or if you'd like to change the default to something like lora-relay-v1 put that here
+default_envs = linux # lora-relay-v1 # nrf52840dk-geeksville # linux # or if you'd like to change the default to something like lora-relay-v1 put that here
 ;default_envs = heltec # lora-relay-v1 # nrf52840dk-geeksville # linux # or if you'd like to change the default to something like lora-relay-v1 put that here
 
 [common]
diff --git a/src/portduino/PortduinoGlue.cpp b/src/portduino/PortduinoGlue.cpp
index 0862e33f9..c8a7e84c4 100644
--- a/src/portduino/PortduinoGlue.cpp
+++ b/src/portduino/PortduinoGlue.cpp
@@ -1,5 +1,6 @@
 #include "CryptoEngine.h"
 #include "target_specific.h"
+#include "PortduinoGPIO.h"
 #include <Utility.h>
 #include "sleep.h"
 
@@ -34,4 +35,15 @@ void cpuDeepSleep(uint64_t msecs) {
 // FIXME - implement real crypto for linux
 CryptoEngine *crypto = new CryptoEngine();
 
-void updateBatteryLevel(uint8_t level) NOT_IMPLEMENTED("updateBatteryLevel");
\ No newline at end of file
+void updateBatteryLevel(uint8_t level) NOT_IMPLEMENTED("updateBatteryLevel");
+
+
+
+/** apps run under portduino can optionally define a portduinoSetup() to 
+ * use portduino specific init code (such as gpioBind) to setup portduino on their host machine,
+ * before running 'arduino' code.
+ */
+void  portduinoSetup() {
+  printf("Setting up Meshtastic on Porduino...\n");
+  gpioBind((new SimGPIOPin(RF95_NSS, "RF95_NSS"))->setSilent());
+}