diff --git a/include/sys/ioctl.h b/include/sys/ioctl.h
index f26c9f8e..2650929e 100644
--- a/include/sys/ioctl.h
+++ b/include/sys/ioctl.h
@@ -29,6 +29,7 @@
 #define TCGETS 0x5401
 #define TCGETA 0x5405
 int ioctl (int fd, unsigned long request, ...);
+int ioctl3 (int fd, unsigned long request, long data);
 
 #endif // ! SYSTEM_LIBC
 
diff --git a/lib/linux/ioctl.c b/lib/linux/ioctl.c
index 5e45c8c7..7df28a0b 100644
--- a/lib/linux/ioctl.c
+++ b/lib/linux/ioctl.c
@@ -33,3 +33,10 @@ ioctl (int filedes, unsigned long command, ...)
   va_end (ap);
   return r;
 }
+
+int
+ioctl3 (int filedes, unsigned long command, long data)
+{
+  int r = _sys_call3 (SYS_ioctl, filedes, command, data);
+  return r;
+}
diff --git a/lib/posix/isatty.c b/lib/posix/isatty.c
index db2319ec..cf983f6c 100644
--- a/lib/posix/isatty.c
+++ b/lib/posix/isatty.c
@@ -58,7 +58,7 @@ int
 __tcgetattr (int filedes, struct termios *termios_p)
 {
   struct ktermios kernel_termios;
-  int r = ioctl (filedes, TCGETS, &kernel_termios);
+  int r = ioctl3 (filedes, TCGETS, (long) &kernel_termios);
 
   termios_p->c_iflag = kernel_termios.c_iflag;
   termios_p->c_oflag = kernel_termios.c_oflag;