diff --git a/devel/autoconf/Makefile b/devel/autoconf/Makefile
index 3df7d504bfa..2cdbd165af1 100644
--- a/devel/autoconf/Makefile
+++ b/devel/autoconf/Makefile
@@ -1,4 +1,4 @@
-# $OpenBSD: Makefile,v 1.3 1999/01/06 21:29:51 marc Exp $
+# $OpenBSD: Makefile,v 1.4 1999/01/18 18:13:03 espie Exp $
 #
 
 DISTNAME=       autoconf-2.13
@@ -11,7 +11,7 @@ MASTER_SITES=	${MASTER_SITE_GNU}
 RUN_DEPENDS=	gm4:${PORTSDIR}/devel/m4
 
 GNU_CONFIGURE=	yes
-CONFIGURE_ENV=	M4=${PREFIX}/bin/gm4
+CONFIGURE_ENV=	M4=${LOCALBASE}/bin/gm4
 
 post-install:
 	@if [ ! -f ${PREFIX}/info/dir ]; then \