1 files changed, 1 insertions, 1 deletions

diff --git a/src/process.c b/src/process.c
index e9ad3b10c33..fa16c178c16 100644
--- a/src/process.c
+++ b/src/process.c
@@ -6808,7 +6808,7 @@ keyboard_bit_set (fd_set *mask)
 
 /* Defined on msdos.c.  */
 extern int sys_select (int, SELECT_TYPE *, SELECT_TYPE *, SELECT_TYPE *,
-                       EMACS_TIME *);
+                       EMACS_TIME *, void *);
 
 /* Implementation of wait_reading_process_output, assuming that there
    are no subprocesses.  Used only by the MS-DOS build.