diff --git a/devel/py-python-dtrace/Makefile b/devel/py-python-dtrace/Makefile
--- a/devel/py-python-dtrace/Makefile
+++ b/devel/py-python-dtrace/Makefile
@@ -1,5 +1,5 @@
 PORTNAME=	python-dtrace
-PORTVERSION=	0.0.11
+PORTVERSION=	0.0.13
 CATEGORIES=	devel python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
@@ -12,17 +12,19 @@
 
 TEST_DEPENDS=	${PYTHON_PKGNAMEPREFIX}pytest>0:devel/py-pytest@${PY_FLAVOR}
 
-USES=		python:3.6+
+USES=		python
 USE_PYTHON=	autoplist distutils cython cython_run
 
 .include <bsd.port.pre.mk>
 
-# TODO: Adjust this check once python-dtrace handles installed dtrace headers
-# (https://reviews.freebsd.org/D27884).
-MAKE_ENV+=	FREEBSD_SRC_DIR=${SRC_BASE}
+# We need to pass the path to the source for older FreeBSD versions that
+# don't install dtrace.h to /usr/include.
+.if !exists(/usr/include/dtrace.h)
 .if !exists(${SRC_BASE}/sys/cddl/contrib/opensolaris/uts/common/sys/dtrace.h)
 IGNORE=	requires kernel source files in SRC_BASE=${SRC_BASE}
 .endif
+MAKE_ENV+=	FREEBSD_SRC_DIR=${SRC_BASE}
+.endif
 
 # Tests not included in the release tarball, uncomment if this changes.
 # TEST_DEPENDS=→${PYTHON_PKGNAMEPREFIX}pytest>0:devel/py-pytest@${PY_FLAVOR}
diff --git a/devel/py-python-dtrace/distinfo b/devel/py-python-dtrace/distinfo
--- a/devel/py-python-dtrace/distinfo
+++ b/devel/py-python-dtrace/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1610032322
-SHA256 (python-dtrace-0.0.11.tar.gz) = b343728e61cb697ab76eb8091a361d7de6735527c788fc85b979db8356640fbc
-SIZE (python-dtrace-0.0.11.tar.gz) = 15143
+TIMESTAMP = 1615201570
+SHA256 (python-dtrace-0.0.13.tar.gz) = 23c6ddb3241686f6845d6333dade5215bb497c3e241a413f8251c42ae941123b
+SIZE (python-dtrace-0.0.13.tar.gz) = 15619