diff --git a/devel/py-ddtrace/Makefile b/devel/py-ddtrace/Makefile
index 3d4f248afd22..bdad396c89bc 100644
--- a/devel/py-ddtrace/Makefile
+++ b/devel/py-ddtrace/Makefile
@@ -1,45 +1,45 @@
 # Created by: Po-Chuan Hsieh <sunpoet@FreeBSD.org>
 # $FreeBSD$
 
 PORTNAME=	ddtrace
 PORTVERSION=	0.44.0
 CATEGORIES=	devel python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	sunpoet@FreeBSD.org
 COMMENT=	Datadog tracing code
 
 LICENSE=	APACHE20 BSD3CLAUSE
 LICENSE_COMB=	dual
 LICENSE_FILE_APACHE20=	${WRKSRC}/LICENSE.Apache
 LICENSE_FILE_BSD3CLAUSE=${WRKSRC}/LICENSE.BSD3
 
 BUILD_DEPENDS=	${PYTHON_PKGNAMEPREFIX}setuptools_scm>=4:devel/py-setuptools_scm@${PY_FLAVOR}
 RUN_DEPENDS=	${PY_ENUM34} \
 		${PYTHON_PKGNAMEPREFIX}intervaltree>=0:devel/py-intervaltree@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}protobuf>=3,1:devel/py-protobuf@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}tenacity>=5:devel/py-tenacity@${PY_FLAVOR}
 
-USES=		python
+USES=		compiler:c11 python
 USE_PYTHON=	autoplist concurrent cython distutils
 
 OPTIONS_DEFINE=	OPENTRACING
 OPTIONS_DEFAULT=OPENTRACING
 OPENTRACING_DESC=	OpenTracing support
 
 OPENTRACING_RUN_DEPENDS=${PYTHON_PKGNAMEPREFIX}opentracing>=2.0.0:devel/py-opentracing@${PY_FLAVOR}
 
 post-patch:
 	@${RM} ${WRKSRC}/ddtrace/profiling/collector/stack.c
 
 post-install:
 	${STRIP_CMD} ${STAGEDIR}${PYTHON_SITELIBDIR}/ddtrace/vendor/*/*.so
 
 .include <bsd.port.pre.mk>
 
 .if ${PYTHON_REL} < 3000
 RUN_DEPENDS+=	${PYTHON_PKGNAMEPREFIX}funcsigs>=0:devel/py-funcsigs@${PY_FLAVOR}
 .endif
 
 .include <bsd.port.post.mk>