--- Makefile.orig
+++ Makefile
@@ -6,7 +6,8 @@
 #
 
 PORTNAME=	libconfig
 PORTVERSION=	1.3.2
+PORTREVISION=	1
 CATEGORIES=	devel
 MASTER_SITES=	http://www.hyperrealm.com/libconfig/
 
@@ -17,7 +18,7 @@
 HAS_CONFIGURE=	yes
 USE_LDCONFIG=	yes
 USE_GMAKE=	yes
-CONFIGURE_ARGS+=	--infodir=${PREFIX}/${INFO_PATH}
+CONFIGURE_ARGS+=	--prefix=${PREFIX} --infodir=${PREFIX}/${INFO_PATH}
 INFO=		libconfig
 
 .include <bsd.port.mk>