diff --git a/security/libfido2/Makefile b/security/libfido2/Makefile
index 423cbf181d1d..f7b11cd3a2b8 100644
--- a/security/libfido2/Makefile
+++ b/security/libfido2/Makefile
@@ -1,39 +1,36 @@
 PORTNAME=	libfido2
 PORTVERSION=	1.16.0
 CATEGORIES=	security
 MASTER_SITES=	https://developers.yubico.com/libfido2/Releases/
 
 MAINTAINER=	sunpoet@FreeBSD.org
 COMMENT=	Provides library functionality for FIDO 2.0
 WWW=		https://developers.yubico.com/libfido2/ \
 		https://github.com/Yubico/libfido2
 
 LICENSE=	BSD2CLAUSE
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 LIB_DEPENDS=	libcbor.so:devel/libcbor
 
 USES=		cmake:testing compiler:c11 pkgconfig ssl
 
 CFLAGS+=	-DOPENSSL_API_COMPAT=0x10100000L
 CMAKE_OFF=	BUILD_TESTS \
 		FUZZ \
 		NFC_LINUX \
 		USE_HIDAPI \
 		USE_PCSC \
 		USE_WINHELLO
 CMAKE_ON=	BUILD_EXAMPLES \
 		BUILD_MANPAGES \
 		BUILD_SHARED_LIBS \
 		BUILD_STATIC_LIBS \
 		BUILD_TOOLS
 CMAKE_TESTING_ON=	BUILD_TESTS
 
 PLIST_SUB=	PORTVERSION=${PORTVERSION}
 
 OPTIONS_DEFINE=	DOCS
 
-post-patch:
-	@${REINPLACE_CMD} -e 's|-D_POSIX_C_SOURCE=200809L|-D_POSIX_C_SOURCE=202405L|' ${WRKSRC}/CMakeLists.txt
-
 .include <bsd.port.mk>
diff --git a/security/libfido2/files/patch-CMakeLists.txt b/security/libfido2/files/patch-CMakeLists.txt
new file mode 100644
index 000000000000..e0fa92c87147
--- /dev/null
+++ b/security/libfido2/files/patch-CMakeLists.txt
@@ -0,0 +1,11 @@
+--- CMakeLists.txt.orig	2025-05-06 06:40:51 UTC
++++ CMakeLists.txt
+@@ -73,7 +73,7 @@ if(NOT MSVC)
+ endif()
+ 
+ if(NOT MSVC)
+-	set(FIDO_CFLAGS "${FIDO_CFLAGS} -D_POSIX_C_SOURCE=200809L")
++	set(FIDO_CFLAGS "${FIDO_CFLAGS} -D_POSIX_C_SOURCE=202405L")
+ 	set(FIDO_CFLAGS "${FIDO_CFLAGS} -D_BSD_SOURCE")
+ 	if(APPLE)
+ 		set(FIDO_CFLAGS "${FIDO_CFLAGS} -D_DARWIN_C_SOURCE")