diff --git a/math/adol-c/Makefile b/math/adol-c/Makefile
index b1fa646f7ae3..9253500bb230 100644
--- a/math/adol-c/Makefile
+++ b/math/adol-c/Makefile
@@ -1,35 +1,37 @@
 PORTNAME=	adol-c
 DISTVERSION=	2.7.2
 PORTREVISION=	1
 CATEGORIES=	math
 MASTER_SITES=	https://www.coin-or.org/download/source/${PORTNAME:tu}/
 DISTNAME=	${PORTNAME:tu}-${DISTVERSION}
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Automatic differentiation library
 
 LICENSE=	EPL
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 BUILD_DEPENDS=	bash:shells/bash
 LIB_DEPENDS=	libboost_system.so:devel/boost-libs
 
-USES=		compiler:c++11-lang gmake libtool tar:tgz
+USES=		compiler:c++11-lang gmake libtool python:3.7+,build tar:tgz
 USE_LDCONFIG=	yes
 
 GNU_CONFIGURE=	yes
 CONFIGURE_SHELL=	${LOCALBASE}/bin/bash
 
+CONFIGURE_ENV=	PYTHON=${PYTHON_CMD}
+
 INSTALL_TARGET=	install-strip
 
 OPTIONS_DEFINE=			SPARSE # also uses AMPI, a seemingly obscure MPI implementation
 OPTIONS_DEFAULT=		SPARSE
 OPTIONS_SUB=			yes
 
 SPARSE_DESC=			Build sparse drivers
 SPARSE_CONFIGURE_ENABLE=	sparse
 
 post-patch: # broken with ColPack: https://github.com/coin-or/ADOL-C/issues/40
 	@${REINPLACE_CMD} -e 's|with_colpack|with_colpackx| ; s|-lColPack||' ${WRKSRC}/configure
 
 .include <bsd.port.mk>