diff --git a/MainModesArbiter_InitStage.c b/MainModesArbiter_InitStage.c
index ecc4c20..ae49936 100644
--- a/MainModesArbiter_InitStage.c
+++ b/MainModesArbiter_InitStage.c
@@ -22,13 +22,13 @@ static void Mma_InitComInt(
 ) {
     tSerialPortIO *thisComIntPortIO;
 
-    thisComIntPortIO = &env->serialPorts->ComIntHalfDuplexIo;
+//    thisComIntPortIO = &env->serialPorts->ComIntHalfDuplexIo;
 
-//    if(GpioPinGet(&env->power.pins->usb)){
-//        thisComIntPortIO = &env->serialPorts->SerialPortUsbIO;
-//    } else {
-//        thisComIntPortIO = &env->serialPorts->ComIntHalfDuplexIo;
-//    }
+    if(GpioPinGet(&env->power.pins->usb)){
+        thisComIntPortIO = &env->serialPorts->SerialPortUsbIO;
+    } else {
+        thisComIntPortIO = &env->serialPorts->ComIntHalfDuplexIo;
+    }
 
 //    thisComIntPortIO = &env->serialPorts->SerialPortCan2IO;
     ComInt_Init(