diff --git a/math/cloog/Makefile b/math/cloog/Makefile
index 7ed9201cc2ff..fc590bd8483d 100644
--- a/math/cloog/Makefile
+++ b/math/cloog/Makefile
@@ -1,27 +1,30 @@
 PORTNAME=	cloog
-PORTVERSION=	0.20.0
-PORTREVISION=	1
+PORTVERSION=	0.21.1
 DISTVERSIONPREFIX=	${PORTNAME}-
 CATEGORIES=	math
 
 MAINTAINER=	danilo@FreeBSD.org
 COMMENT=	Code generator in the polyhedral model
 WWW=		http://www.cloog.org/
 
 LICENSE=	LGPL21
 
 LIB_DEPENDS=	libgmp.so:math/gmp \
-		libisl.so:devel/isl
+		libisl.so:devel/isl \
+		libosl.so:math/openscop
 
 USES=		autoreconf gmake libtool
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	periscop
 
 USE_LDCONFIG=	yes
 GNU_CONFIGURE=	yes
 INSTALL_TARGET=install-strip
-CONFIGURE_ARGS+=	--with-gmp-prefix=${LOCALBASE} --with-isl-prefix=${LOCALBASE}
+CONFIGURE_ARGS+=--with-gmp-prefix=${LOCALBASE} \
+		--with-isl-prefix=${LOCALBASE} \
+		--with-osl-prefix=${LOCALBASE} \
+		--with-osl=system
 CONFIGURE_ENV=	pkgconfig_libdir=${PREFIX}/libdata/pkgconfig/ ac_cv_prog_TEXI2DVI=""
 
 .include <bsd.port.mk>
diff --git a/math/cloog/distinfo b/math/cloog/distinfo
index ab395dae2c1e..6adca4c2a203 100644
--- a/math/cloog/distinfo
+++ b/math/cloog/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1596748475
-SHA256 (periscop-cloog-cloog-0.20.0_GH0.tar.gz) = e6bdbe02a409f216ec724e26317d122baa17467e05fe5ad3cc8591f2f0a5df47
-SIZE (periscop-cloog-cloog-0.20.0_GH0.tar.gz) = 512106
+TIMESTAMP = 1688139392
+SHA256 (periscop-cloog-cloog-0.21.1_GH0.tar.gz) = eace8938416a3240c073bdf935b12d2f9c115ec574d9bcbcc9423fe96ed530eb
+SIZE (periscop-cloog-cloog-0.21.1_GH0.tar.gz) = 521330