diff --git a/devel/nlohmann-json/Makefile b/devel/nlohmann-json/Makefile
index 133dae88f39d..cd3b56a36c9d 100644
--- a/devel/nlohmann-json/Makefile
+++ b/devel/nlohmann-json/Makefile
@@ -1,28 +1,33 @@
 PORTNAME=	json
 DISTVERSIONPREFIX=	v
 DISTVERSION=	3.12.0
+PORTREVISION=	1
 CATEGORIES=	devel
 PKGNAMEPREFIX=	nlohmann-
 
+# https://github.com/nlohmann/json/pull/4736 fix for missing char8_t support
+PATCH_SITES=	https://github.com/${GH_ACCOUNT}/${PORTNAME}/commit/
+PATCHFILES=	34868f90149de02432ea758a29227a6ad74f098c.patch:-p1
+
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	JSON library for Modern C++
 WWW=		https://nlohmann.github.io/json/ \
 		https://github.com/nlohmann/json
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE.MIT
 
 USES=		cmake:testing compiler:c++11-lib
 USE_GITHUB=	yes
 GH_ACCOUNT=	nlohmann
 
 NO_BUILD=	yes
 NO_ARCH=	yes
 
 CMAKE_ON=	JSON_MultipleHeaders
 CMAKE_OFF=	JSON_BuildTests
 CMAKE_TESTING_ON=	JSON_BuildTests
 
 # tests as of 3.12.0: 96% tests passed, 4 tests failed out of 101 (4 cmake_fetch_content* tests fail, https://github.com/nlohmann/json/issues/2951)
 
 .include <bsd.port.mk>
diff --git a/devel/nlohmann-json/distinfo b/devel/nlohmann-json/distinfo
index aebebac1b464..060c009fe910 100644
--- a/devel/nlohmann-json/distinfo
+++ b/devel/nlohmann-json/distinfo
@@ -1,3 +1,5 @@
-TIMESTAMP = 1744489818
+TIMESTAMP = 1751420793
 SHA256 (nlohmann-json-v3.12.0_GH0.tar.gz) = 4b92eb0c06d10683f7447ce9406cb97cd4b453be18d7279320f7b2f025c10187
 SIZE (nlohmann-json-v3.12.0_GH0.tar.gz) = 9678593
+SHA256 (34868f90149de02432ea758a29227a6ad74f098c.patch) = c80334fdc49b8e4762a83b671e9526e7ee30a89c190c36c4e1d963bbfaf8c66b
+SIZE (34868f90149de02432ea758a29227a6ad74f098c.patch) = 6513