diff --git a/security/palisade/Makefile b/security/palisade/Makefile
index b0feeb7aeb5b..32c8e2fb566f 100644
--- a/security/palisade/Makefile
+++ b/security/palisade/Makefile
@@ -1,57 +1,57 @@
 PORTNAME=	palisade
 DISTVERSIONPREFIX=	v
 DISTVERSION=	1.11.9
 CATEGORIES=	security math
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	PALISADE lattice cryptography library for Fully Homomorphic Encryption
 WWW=		https://palisade-crypto.org
 
 LICENSE=	BSD2CLAUSE
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 BROKEN_i386=		fails to build: a declaration of 'Mul128' must be available
 
 BUILD_DEPENDS=	autoconf:devel/autoconf # possibly a mistake in the project
 
 USES=		cmake:noninja,testing localbase # compiler:c++11-lang
 USE_GITLAB=	yes
 USE_GITHUB=	nodefault
 GL_PROJECT=	palisade-release # there's also palisade-development
 GL_TAGNAME=	3d1f9a3f9fd389df1f8f27f286511f4f5871258b
 GH_TUPLE=	\
 		JerryRyan:cereal:a384b101:cereal/third-party/cereal \
 		google:benchmark:e451e50e:benchmark/third-party/google-benchmark \
 		google:googletest:8b4817e3:google_test/third-party/google-test
 USE_LDCONFIG=	yes
 
-CMAKE_OFF=	BUILD_UNITTESTS BUILD_EXAMPLES BUILD_BENCHMARKS WITH_WERROR
+CMAKE_OFF=	BUILD_UNITTESTS BUILD_EXAMPLES BUILD_BENCHMARKS
 CMAKE_OFF+=	WITH_NTL # https://gitlab.com/palisade/palisade-development/-/issues/180
 CMAKE_ARGS=	-DWITH_NTL=Y # libntl.so will be discontinued in 1.11, see https://gitlab.com/palisade/palisade-development/-/issues/180
 CMAKE_TESTING_ON=	BUILD_UNITTESTS
 CMAKE_TESTING_TARGET=	testall
 
 CXXFLAGS+=	-I${WRKSRC}/third-party/google-test/googletest
 
 BINARY_ALIAS=	git=false
 
 LDFLAGS+=	-pthread # only for tests: see https://gitlab.com/palisade/palisade-release/-/issues/23
 
 OPTIONS_DEFINE=		OPENMP HEXL
 .if exists(/usr/include/omp.h)
 OPTIONS_DEFAULT=	OPENMP
 .endif
 
 HEXL_DESC=		Use Intel Hexl Library
 
 OPENMP_CMAKE_BOOL=	WITH_OPENMP
 HEXL_CMAKE_BOOL=	WITH_HEXL
 HEXL_LIB_DEPENDS=	libhexl.so:security/hexl
 
 .include <bsd.port.pre.mk>
 
 .if ${OPSYS} == FreeBSD && ( ${OSVERSION} >= 1400079 || ( ${OSVERSION} >= 1302505 && ${OSVERSION} < 1400000 ))
 CXXFLAGS+=	-Wno-error=unused-but-set-variable
 .endif
 
 .include <bsd.port.post.mk>
diff --git a/security/palisade/files/patch-CMakeLists.txt b/security/palisade/files/patch-CMakeLists.txt
new file mode 100644
index 000000000000..08da4d305d39
--- /dev/null
+++ b/security/palisade/files/patch-CMakeLists.txt
@@ -0,0 +1,15 @@
+- remove -Werror to fix build errors on 15
+
+--- CMakeLists.txt.orig	2024-05-03 18:15:41 UTC
++++ CMakeLists.txt
+@@ -173,8 +173,8 @@ endif()
+    set (NATIVE_OPT "")
+ endif()
+ 
+-set(C_COMPILE_FLAGS "-Wall -Werror -O3 ${NATIVE_OPT} -DPALISADE_VERSION=${PALISADE_VERSION}")
+-set(CXX_COMPILE_FLAGS "-Wall -Werror -O3 ${NATIVE_OPT} -DPALISADE_VERSION=${PALISADE_VERSION} ${IGNORE_WARNINGS}")
++set(C_COMPILE_FLAGS "-Wall ${NATIVE_OPT} -DPALISADE_VERSION=${PALISADE_VERSION}")
++set(CXX_COMPILE_FLAGS "-Wall ${NATIVE_OPT} -DPALISADE_VERSION=${PALISADE_VERSION} ${IGNORE_WARNINGS}")
+ 
+ if ( EMSCRIPTEN )
+ 	set(EMSCRIPTEN_IGNORE_WARNINGS "-Wno-unused-but-set-variable -Wno-unknown-warning-option")