1 files changed, 1 insertions, 1 deletions

diff --git a/autogen/configure b/autogen/configure
index a82c52daf98..984476f993a 100755
--- a/autogen/configure
+++ b/autogen/configure
@@ -16573,7 +16573,7 @@ $as_echo "#define UNIX98_PTYS 1" >>confdefs.h
                   $as_echo "#define PTY_TTY_NAME_SPRINTF { char *ptyname = 0; sigset_t blocked; sigemptyset (&blocked); sigaddset (&blocked, SIGCHLD); pthread_sigmask (SIG_BLOCK, &blocked, 0); if (grantpt (fd) != -1 && unlockpt (fd) != -1) ptyname = ptsname(fd); pthread_sigmask (SIG_UNBLOCK, &blocked, 0); if (!ptyname) { emacs_close (fd); return -1; } snprintf (pty_name, PTY_NAME_SIZE, \"%s\", ptyname); }" >>confdefs.h
 
             if test "x$ac_cv_func_posix_openpt" = xyes; then
-        $as_echo "#define PTY_OPEN fd = posix_openpt (O_RDWR | O_CLOEXEC | O_NOCTTY)" >>confdefs.h
+        $as_echo "#define PTY_OPEN do { fd = posix_openpt (O_RDWR | O_CLOEXEC | O_NOCTTY); if (fd < 0 && errno == EINVAL) fd = posix_openpt (O_RDWR | O_NOCTTY); } while (0)" >>confdefs.h
 
         $as_echo "#define PTY_NAME_SPRINTF /**/" >>confdefs.h