1 files changed, 1 insertions, 1 deletions
diff --git a/misc/vhangup.c b/misc/vhangup.c
index a8571f7c56..afee526f39 100644
--- a/misc/vhangup.c
+++ b/misc/vhangup.c
@@ -22,7 +22,7 @@
    with the control terminal, and then send a SIGHUP signal to the process
    group of the control terminal.  */
 int
-vhangup ()
+vhangup (void)
 {
   __set_errno (ENOSYS);
   return -1;