diff --git a/math/libsemigroups/Makefile b/math/libsemigroups/Makefile
index 27011f6aafb2..3f7f8e723ee1 100644
--- a/math/libsemigroups/Makefile
+++ b/math/libsemigroups/Makefile
@@ -1,36 +1,37 @@
 PORTNAME=	libsemigroups
 PORTVERSION=	2.7.3
 DISTVERSIONPREFIX=	v
+PORTREVISION=	1
 CATEGORIES=	math
 
 MAINTAINER=	thierry@FreeBSD.org
 COMMENT=	C++ library for semigroups and monoids
 WWW=		https://libsemigroups.readthedocs.io/en/latest/
 
 LICENSE=	GPLv3
 
 BUILD_DEPENDS=	HPCombi>0:math/hpcombi
 LIB_DEPENDS=	libfmt.so:devel/libfmt
 
 USE_GITHUB=	yes
 
 USES=		autoreconf compiler:c++11-lang eigen:3,build \
 		libtool pathfix pkgconfig
 
 GNU_CONFIGURE=	yes
 CONFIGURE_ARGS=	--enable-fmt --with-external-fmt=yes	\
 		--with-external-eigen
 #LIBS=		-lexecinfo
 USE_LDCONFIG=	yes
 INSTALL_TARGET=	install-strip
 TEST_TARGET=	check
 
 .include <bsd.port.pre.mk>
 
 .if ${ARCH} != amd64
 CONFIGURE_ARGS+=	--disable-hpcombi
 .else
 CONFIGURE_ARGS+=	--enable-hpcombi
 .endif
 
 .include <bsd.port.post.mk>