1 files changed, 2 insertions, 1 deletions

diff --git a/src/sysdep.c b/src/sysdep.c
index a165a9ca52f..f4f767dac3f 100644
--- a/src/sysdep.c
+++ b/src/sysdep.c
@@ -2361,7 +2361,8 @@ serial_configure (struct Lisp_Process *p,
   CHECK_NUMBER (tem);
   err = cfsetspeed (&attr, XINT (tem));
   if (err != 0)
-    error ("cfsetspeed(%d) failed: %s", XINT (tem), emacs_strerror (errno));
+    error ("cfsetspeed(%"pEd") failed: %s", XINT (tem),
+           emacs_strerror (errno));
   childp2 = Fplist_put (childp2, QCspeed, tem);
 
   /* Configure bytesize.  */