diff --git "a/C:\\Users\\JOHNE~1\\AppData\\Local\\Temp\\gteA977.tmp\\gtestutils-HEAD-left.c" "b/F:\\+GTK-SOURCES\\gnu-windows\\src\\MB3Glib\\glib\\gtestutils.c"
index 149bd53..7d9f5d0 100644
--- "a/C:\\Users\\JOHNE~1\\AppData\\Local\\Temp\\gteA977.tmp\\gtestutils-HEAD-left.c"
+++ "b/F:\\+GTK-SOURCES\\gnu-windows\\src\\MB3Glib\\glib\\gtestutils.c"
@@ -2236,7 +2236,7 @@ child_read (GIOChannel *io, GIOCondition cond, gpointer user_data)
   GIOStatus status;
   gsize nread, nwrote, total;
   gchar buf[4096];
-  int echo_fd = -1;
+  FILE *echo_message = 0;
 
   status = g_io_channel_read_chars (io, buf, sizeof (buf), &nread, NULL);
   if (status == G_IO_STATUS_ERROR || status == G_IO_STATUS_EOF)
@@ -2257,21 +2257,21 @@ child_read (GIOChannel *io, GIOCondition cond, gpointer user_data)
     {
       g_string_append_len (data->stdout_str, buf, nread);
       if (data->echo_stdout)
-        echo_fd = STDOUT_FILENO;
+        echo_message = stdout;
     }
   else
     {
       g_string_append_len (data->stderr_str, buf, nread);
       if (data->echo_stderr)
-        echo_fd = STDERR_FILENO;
+        echo_message = stderr;
     }
 
-  if (echo_fd != -1)
+  if (echo_message)
     {
       for (total = 0; total < nread; total += nwrote)
         {
           do
-            nwrote = write (echo_fd, buf + total, nread - total);
+            nwrote = write (fileno(echo_message), buf + total, nread - total);
           while (nwrote == -1 && errno == EINTR);
           if (nwrote == -1)
             g_error ("write failed: %s", g_strerror (errno));