--- a/src/asy.c	2002-09-06 19:29:26.000000000 +0200
+++ b/src/asy.c	2026-10-16 22:35:32.052233582 +0200
@@ -33,7 +33,7 @@
 
 static byte PendingDataBuffer;
 static int PendingData = FALSE;
-static struct termio OriginalSerialParameters;
+static struct termios OriginalSerialParameters;
 
 
 /*******************************************************************************
@@ -52,7 +52,7 @@ static struct termio OriginalSerialParam
 
 int asy_open(char *Port, int Baud)
 {
-  struct termio SerialParameters;
+  struct termios SerialParameters;
   int i, fd;
 
   /* We want to open the port in nodelay mode, so we are informed if the
@@ -73,26 +73,28 @@ int asy_open(char *Port, int Baud)
   }
 
   /* Now change the rest of the parameters - non-canonical input, etc. */
-  if (ioctl (fd, TCGETA, &SerialParameters) == -1) {
+  if (tcgetattr (fd, &SerialParameters) == -1) {
 #ifdef DEBUG
     fprintf (stderr, "asy_open: Cannot ioctl (get) on port %s. Errno = %d\n", Port, errno);
 #endif
     return -1;
   }
 
-  (void) ioctl (fd, TCGETA, &OriginalSerialParameters);
+  (void) tcgetattr (fd, &OriginalSerialParameters);
 
   SerialParameters.c_cflag = Baud | CS8 | CLOCAL | CREAD | CRTSCTS;
   SerialParameters.c_lflag = 0;
   SerialParameters.c_oflag = 0;
   SerialParameters.c_iflag = IGNBRK | IGNPAR;
-  for (i = 0; i < NCC; i++)
+  cfsetispeed (&SerialParameters, Baud);
+  cfsetospeed (&SerialParameters, Baud);
+  for (i = 0; i < NCCS; i++)
     SerialParameters.c_cc[i] = (unsigned char) 0;
 
   SerialParameters.c_cc[VMIN] = (unsigned char) 0;
   SerialParameters.c_cc[VTIME] = (unsigned char) DataTimeout;
 
-  if (ioctl (fd, TCSETA, &SerialParameters) == -1) {
+  if (tcsetattr (fd, TCSANOW, &SerialParameters) == -1) {
 #ifdef DEBUG
     fprintf (stderr, "asy_open: Cannot ioctl (set) on port %s. Errno = %d\n", Port, errno);
 #endif
@@ -115,7 +117,7 @@ int asy_open(char *Port, int Baud)
 
 void asy_close(int fd)
 {
-  if (ioctl (fd, TCSETA, &OriginalSerialParameters) == -1) {
+  if (tcsetattr (fd, TCSANOW, &OriginalSerialParameters) == -1) {
 #ifdef DEBUG
     fprintf (stderr, "asy_close: Cannot ioctl (reset). Errno = %d\n", errno);
 #endif