diff --git a/www/lagrange/Makefile b/www/lagrange/Makefile
index 02f0f46ca5b0..21e23681ebaf 100644
--- a/www/lagrange/Makefile
+++ b/www/lagrange/Makefile
@@ -1,30 +1,36 @@
 PORTNAME=	lagrange
 DISTVERSION=	1.2.2
+PORTREVISION=	1
 CATEGORIES=	www
 MASTER_SITES=	https://git.skyjake.fi/skyjake/${PORTNAME}/releases/download/v${DISTVERSION}/
 
 MAINTAINER=	lcook@FreeBSD.org
 COMMENT=	Beautiful Gemini Client
 
 LICENSE=	BSD2CLAUSE
 LICENSE_FILE=	${WRKSRC}/LICENSE.md
 
 BROKEN_SSL=	libressl
 BROKEN_SSL_REASON_libressl=	needs features only available in OpenSSL
 
 LIB_DEPENDS=	libmpg123.so:audio/mpg123 \
 		libpcre.so:devel/pcre \
 		libunistring.so:devel/libunistring
 
 USES=		cmake compiler:c11 desktop-file-utils pkgconfig sdl ssl
 USE_SDL=	sdl2
 
+OPTIONS_DEFINE=	SSE41
+
+SSE41_DESC=	Enable SSE4.1 support
+SSE41_CMAKE_ON=	-DTFDN_ENABLE_SSE41:BOOL=ON
+
 OPENSSL_LDFLAGS=	-lssl -lcrypto
 
 .include <bsd.port.pre.mk>
 
 .if ${OPSYS} == FreeBSD && ${OSVERSION} < 1200085 && ${SSL_DEFAULT} == base
 BROKEN=		requires at least OpenSSL version 1.1.1 to build
 .endif
 
 .include <bsd.port.post.mk>
diff --git a/www/lagrange/files/patch-lib_the__Foundation_CheckSSE.cmake b/www/lagrange/files/patch-lib_the__Foundation_CheckSSE.cmake
new file mode 100644
index 000000000000..20c25373b943
--- /dev/null
+++ b/www/lagrange/files/patch-lib_the__Foundation_CheckSSE.cmake
@@ -0,0 +1,32 @@
+Disable SSE4.1 by default and make it opt-in only.
+
+Older class AMD64 and i386 CPUs do not support the
+feature-set, this becomes a problem when a build
+hosts support it, whilst package consumers do not,
+causing an instant crash upon startup.
+
+--- lib/the_Foundation/CheckSSE.cmake.orig	2021-04-22 10:39:48 UTC
++++ lib/the_Foundation/CheckSSE.cmake
+@@ -1,22 +1 @@
+ set (SSE41_FOUND NO)
+-try_run (
+-    sseRunCode
+-    sseCompiled
+-    ${CMAKE_CURRENT_BINARY_DIR}
+-    ${CMAKE_CURRENT_LIST_DIR}/ssecheck.c
+-    RUN_OUTPUT_VARIABLE sseOutput
+-)
+-string (STRIP "${sseOutput}" sseOutput)
+-# message (STATUS "sseCompiled: ${sseCompiled}")
+-# message (STATUS "sseRunCode: ${sseRunCode}")
+-# message (STATUS "sseOutput: ${sseOutput}")
+-
+-if (sseCompiled AND sseOutput STREQUAL "1")
+-    set (SSE41_FOUND YES)
+-endif ()
+-
+-if (SSE41_FOUND)
+-    message (STATUS "CPU supports SSE 4.1")
+-else ()
+-    message (STATUS "CPU does not support SSE 4.1")
+-endif ()