diff --git a/devel/py-pyls-black/Makefile b/devel/py-pyls-black/Makefile
index 3adafea35069..05739d37292b 100644
--- a/devel/py-pyls-black/Makefile
+++ b/devel/py-pyls-black/Makefile
@@ -1,23 +1,26 @@
 PORTNAME=	pyls-black
 PORTVERSION=	0.4.7
 PORTREVISION=	2
 CATEGORIES=	devel python
 MASTER_SITES=	PYPI
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	rhurlin@FreeBSD.org
 COMMENT=	Black plugin for the Python Language Server
 WWW=		https://github.com/rupert/pyls-black
 
 LICENSE=	MIT
 
-BUILD_DEPENDS=	${PYTHON_PKGNAMEPREFIX}wheel>0:devel/py-wheel@${PY_FLAVOR}
+# Per PEP-518, the default [build-system] section when not defined is:
+# requires = ["setuptools", "wheel"]  # PEP 508 specifications.
+BUILD_DEPENDS=	${PYTHON_PKGNAMEPREFIX}setuptools>0:devel/py-setuptools@${PY_FLAVOR} \
+		${PYTHON_PKGNAMEPREFIX}wheel>0:devel/py-wheel@${PY_FLAVOR}
 RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}black>0:devel/py-black@${PY_FLAVOR}
 
 # No tests because they are not in the release tarball
 USES=		python:3.6+
 USE_PYTHON=	autoplist concurrent pep517
 
 NO_ARCH=	yes
 
 .include <bsd.port.mk>