diff --git a/getfile.cpp b/getfile.cpp
index 7db8f1a66..ecc7bbb65 100644
--- a/getfile.cpp
+++ b/getfile.cpp
@@ -170,10 +170,28 @@ int ptt(int nport, int ntx, int* iptt, int* nopen)
   if((i3+i4+i5+i6+i9+i00)==-999) return 1;    //Silence compiler warning
   return 0;
 #else
-    int iptt1,nopen1;
-  ptt_(nport,ntx, &iptt1, &nopen1);
-  *iptt=iptt1;
-  *nopen=nopen1;
+  int control=TIOCM_RTS | TIOCM_DTR;
+//  int control = TIOCM_RTS;
+  static int fd;
+
+  if(*nopen==0) {
+    fd=open("/dev/ttyUSB0",O_RDWR | O_NONBLOCK);
+    if(fd<0) {
+      return -1;
+    }
+    *nopen=1;
+  }
+
+  if(ntx) {
+    ioctl(fd, TIOCMBIS, &control);
+    *iptt=1;
+    *nopen=1;
+  } else {
+    ioctl(fd, TIOCMBIC, &control);
+    close(fd);
+    *iptt=0;
+    *nopen=0;
+  }
   return 0;
 #endif
   if((nport+ntx+(*iptt)==-99999)) *nopen=0;   //Silence compiler warning
diff --git a/mainwindow.cpp b/mainwindow.cpp
index ba6f1cab2..330352509 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -1,4 +1,4 @@
-//--------------------------------------------------------------- MainWindow
+//---------------------------------------------------------------- MainWindow
 #include "mainwindow.h"
 #include "ui_mainwindow.h"
 #include "devsetup.h"