1 files changed, 1 insertions, 1 deletions
diff --git a/posix/setsid.c b/posix/setsid.c
index d442d5775a..d3b99b2beb 100644
--- a/posix/setsid.c
+++ b/posix/setsid.c
@@ -23,7 +23,7 @@
    The process group IDs of the session and the calling process
    are set to the process ID of the calling process, which is returned.  */
 int
-__setsid ()
+__setsid (void)
 {
   __set_errno (ENOSYS);
   return -1;