1 files changed, 4 insertions, 0 deletions
diff --git a/job.c b/job.c
index 2ae14c0..43453b8 100644
--- a/job.c
+++ b/job.c
@@ -47,6 +47,10 @@ char default_shell[] = "/bin/sh";
 
 #ifdef	HAVE_WAITPID
 #define	WAIT_NOHANG(status)	waitpid (-1, (status), WNOHANG)
+/* The second arg to `waitpid' is always an `int *'.
+   The system might support `union wait' for compatibility in calls to
+   `wait3' or `wait', but most such systems don't support it for `waitpid'.  */
+#undef	HAVE_UNION_WAIT
 #else	/* Don't have waitpid.  */
 #ifdef	HAVE_WAIT3
 #ifndef	wait3