diff --git a/devel/libbson/Makefile b/devel/libbson/Makefile
index 5677408f56ad..7f13900d789c 100644
--- a/devel/libbson/Makefile
+++ b/devel/libbson/Makefile
@@ -1,42 +1,43 @@
 PORTNAME=	libbson
 PORTVERSION=	1.23.2
+PORTREVISION=	1
 CATEGORIES=	devel
 
 MAINTAINER=	ports@bsdserwis.com
 COMMENT=	BSON utility library
 WWW=		https://github.com/mongodb/mongo-c-driver
 
 LICENSE=	APACHE20
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 USES=		cmake:noninja cpe pkgconfig
 USE_GITHUB=	yes
 CPE_VENDOR=	mongodb
 GH_ACCOUNT=	mongodb
 GH_PROJECT=	mongo-c-driver
 USE_LDCONFIG=	yes
 
 DOCS_VARS=	BUILD_DEPENDS+=sphinx-build:textproc/py-sphinx
 
 PATCH_STRIP=	-p1
 CFLAGS+=	-D__BSD_VISIBLE=1
 LDFLAGS+=	-pthread
 
 OPTIONS_DEFINE=	DOCS
 OPTIONS_DEFAULT=
 
 CMAKE_ON=	ENABLE_EXAMPLES
 CMAKE_OFF=	ENABLE_TESTS ENABLE_UNINSTALL
 DOCS_CMAKE_ON=	-DENABLE_HTML_DOCS=ON -DENABLE_MAN_PAGES=ON
 CMAKE_ARGS=	-DENABLE_MONGOC=OFF -DENABLE_BSON=ON
 CMAKE_ARGS+=	-DENABLE_ZLIB=ON -DENABLE_ZSTD=ON
 CMAKE_ARGS+=	-DBSON_HAVE_STRINGS_H=0
 
 post-extract:
 	${ECHO} "${PORTVERSION}" > ${WRKSRC}/VERSION_CURRENT
 
 post-install:
 	${MV} ${STAGEDIR}${PREFIX}/share/mongo-c-driver \
 		${STAGEDIR}${PREFIX}/share/libbson
 
 .include <bsd.port.mk>
diff --git a/devel/libbson/files/patch-CMakeLists.txt b/devel/libbson/files/patch-CMakeLists.txt
new file mode 100644
index 000000000000..68a5ce58253b
--- /dev/null
+++ b/devel/libbson/files/patch-CMakeLists.txt
@@ -0,0 +1,13 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index caaf53499..2dd8cc398 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -249,7 +249,7 @@ cmake_policy (SET CMP0042 NEW)
+ # Both _BSD_SOURCE and _DEFAULT_SOURCE are defined for backwards-compatibility with glibc 2.19 and earlier.
+ # _BSD_SOURCE and _DEFAULT_SOURCE are required by `getpagesize`, `h_errno`, etc.
+ # _XOPEN_SOURCE=700 is required by `strnlen`, etc.
+-add_definitions (-D_XOPEN_SOURCE=700 -D_BSD_SOURCE -D_DEFAULT_SOURCE)
++# add_definitions (-D_XOPEN_SOURCE=700 -D_BSD_SOURCE -D_DEFAULT_SOURCE)
+ list (APPEND CMAKE_REQUIRED_DEFINITIONS -D_XOPEN_SOURCE=700 -D_BSD_SOURCE -D_DEFAULT_SOURCE)
+ 
+ # https://opensource.apple.com/source/Libc/Libc-1439.40.11/gen/compat.5.auto.html