diff --git a/devel/microsoft-gsl/Makefile b/devel/microsoft-gsl/Makefile
index 93e489e61bfb..a4b780f77a56 100644
--- a/devel/microsoft-gsl/Makefile
+++ b/devel/microsoft-gsl/Makefile
@@ -1,23 +1,27 @@
 PORTNAME=	microsoft-gsl
 DISTVERSIONPREFIX=	v
 DISTVERSION=	4.1.0
+PORTREVISION=	1
 CATEGORIES=	devel
 
+PATCH_SITES=	https://github.com/microsoft/GSL/commit/
+PATCHFILES=	87f9d768866548b5b86e72be66c60c5abd4d9b37.patch:-p1
+
 MAINTAINER=	henry.hu.sh@gmail.com
 COMMENT=	Guidelines Support Library
 WWW=		https://github.com/microsoft/GSL
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 USES=		cmake
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	microsoft
 GH_PROJECT=	GSL
 
 CMAKE_OFF=	GSL_TEST
 
 NO_ARCH=	yes
 
 .include <bsd.port.mk>
diff --git a/devel/microsoft-gsl/distinfo b/devel/microsoft-gsl/distinfo
index 25be1e2ccaa7..56115df11e4f 100644
--- a/devel/microsoft-gsl/distinfo
+++ b/devel/microsoft-gsl/distinfo
@@ -1,3 +1,5 @@
-TIMESTAMP = 1729397891
+TIMESTAMP = 1730937308
 SHA256 (microsoft-GSL-v4.1.0_GH0.tar.gz) = 14255cb38a415ba0cc4f696969562be7d0ed36bbaf13c5e4748870babf130c48
 SIZE (microsoft-GSL-v4.1.0_GH0.tar.gz) = 57895
+SHA256 (87f9d768866548b5b86e72be66c60c5abd4d9b37.patch) = 8e09629d7904edc9f2e2ad70bc6c3043e80c3ab2a9a7fa479745a9aaf01a5835
+SIZE (87f9d768866548b5b86e72be66c60c5abd4d9b37.patch) = 1006