3 files changed, 9 insertions, 0 deletions

diff --git a/src/m/convex.h b/src/m/convex.h
index bd5125a2435..272a033e36c 100644
--- a/src/m/convex.h
+++ b/src/m/convex.h
@@ -189,3 +189,6 @@ Boston, MA 02111-1307, USA.  */
     -L /usr/lib \
     '-A__iob=___ap$$iob' '-A_use_libc_sema=___ap$$use_libc_sema'
 #endif
+
+/* The convex has sys/wait.h but it does not work right.  */
+#undef HAVE_SYS_WAIT_H
diff --git a/src/s/hpux.h b/src/s/hpux.h
index 36d6680a9f2..8b7bded93aa 100644
--- a/src/s/hpux.h
+++ b/src/s/hpux.h
@@ -216,3 +216,6 @@ Boston, MA 02111-1307, USA.  */
 
 /* This triggers a conditional in xfaces.c.  */
 #define XOS_NEEDS_TIME_H
+
+/* HPUX 7 has sys/wait.h but it does not work right.  */
+#undef HAVE_SYS_WAIT_H
diff --git a/src/s/isc4-1.h b/src/s/isc4-1.h
index dcb66b742b4..df549b9fb7b 100644
--- a/src/s/isc4-1.h
+++ b/src/s/isc4-1.h
@@ -27,3 +27,6 @@
 /* According to template.h HAVE_TERMIO and HAVE_TERMIOS shouldn't be */
 /* defined at the same time. */
 #undef HAVE_TERMIO
+
+/* ISC 4.1 has sys/wait.h but it does not work right.  */
+#undef HAVE_SYS_WAIT_H