diff --git a/tools/compat/configure.ac b/tools/compat/configure.ac
index fac6a69d1e76..9e37e0c23686 100644
--- a/tools/compat/configure.ac
+++ b/tools/compat/configure.ac
@@ -1,4 +1,4 @@
-#	$NetBSD: configure.ac,v 1.106 2023/07/20 15:15:23 lukem Exp $
+#	$NetBSD: configure.ac,v 1.107 2023/07/20 16:21:23 lukem Exp $
 #
 # Autoconf definition file for libnbcompat.
 #
@@ -228,7 +228,7 @@ AC_CHECK_FUNCS(atoll asprintf asnprintf basename devname dirfd dirname \
 	dprintf esetfunc fgetln flock fpurge __fpurge futimes getline \
 	getopt getopt_long group_from_gid gid_from_group \
 	heapsort isblank issetugid lchflags lchmod lchown lutimes mkstemp \
-	mkdtemp poll pread putc_unlocked pwcache_userdb pwcache_groupdb \
+	mkdtemp poll posix_spawn pread putc_unlocked pwcache_userdb pwcache_groupdb \
 	pwrite raise_default_signal random reallocarr reallocarray setenv \
 	setgroupent setprogname setpassent \
 	snprintb_m snprintf strlcat strlcpy strmode \
diff --git a/usr.bin/xinstall/Makefile b/usr.bin/xinstall/Makefile
index e56c1bde2cf6..d7acc3820674 100644
--- a/usr.bin/xinstall/Makefile
+++ b/usr.bin/xinstall/Makefile
@@ -1,4 +1,4 @@
-#	$NetBSD: Makefile,v 1.30 2023/06/03 09:09:19 lukem Exp $
+#	$NetBSD: Makefile,v 1.31 2023/07/20 16:21:23 lukem Exp $
 #	@(#)Makefile	8.1 (Berkeley) 6/6/93
 
 .include <bsd.own.mk>
@@ -11,7 +11,6 @@ MAN=	install.1
 CPPFLAGS+=	-I${NETBSDSRCDIR}/usr.sbin/mtree
 
 .if (${HOSTPROG:U} == "")
-CPPFLAGS+=	-DHAVE_POSIX_SPAWN
 DPADD+= ${LIBUTIL}
 LDADD+= -lutil
 .endif
diff --git a/usr.bin/xinstall/xinstall.c b/usr.bin/xinstall/xinstall.c
index 097066dc9bcc..2fb7e010b0be 100644
--- a/usr.bin/xinstall/xinstall.c
+++ b/usr.bin/xinstall/xinstall.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: xinstall.c,v 1.126 2020/10/30 20:05:00 rillig Exp $	*/
+/*	$NetBSD: xinstall.c,v 1.127 2023/07/20 16:21:23 lukem Exp $	*/
 
 /*
  * Copyright (c) 1987, 1993
@@ -64,6 +64,7 @@
 #include "nbtool_config.h"
 #else
 #define HAVE_FUTIMES 1
+#define HAVE_POSIX_SPAWN 1
 #define HAVE_STRUCT_STAT_ST_FLAGS 1
 #endif
 
@@ -77,7 +78,7 @@ __COPYRIGHT("@(#) Copyright (c) 1987, 1993\
 #if 0
 static char sccsid[] = "@(#)xinstall.c	8.1 (Berkeley) 7/21/93";
 #else
-__RCSID("$NetBSD: xinstall.c,v 1.126 2020/10/30 20:05:00 rillig Exp $");
+__RCSID("$NetBSD: xinstall.c,v 1.127 2023/07/20 16:21:23 lukem Exp $");
 #endif
 #endif /* not lint */