diff --git a/math/fxt/Makefile b/math/fxt/Makefile
index 2ce068078b26..86b86c16ead8 100644
--- a/math/fxt/Makefile
+++ b/math/fxt/Makefile
@@ -1,26 +1,25 @@
 PORTNAME=	fxt
-PORTVERSION=	2026.01.31
+PORTVERSION=	2026.05.19
 CATEGORIES=	math
 MASTER_SITES=	https://www.jjj.de/fxt/
 
 MAINTAINER=	sunpoet@FreeBSD.org
 COMMENT=	Llibrary of low-level algorithms
 WWW=		https://www.jjj.de/fxt/
 
 LICENSE=	GPLv3+
 LICENSE_FILE=	${WRKSRC}/COPYING.txt
 
-USES=		compiler:c++11-lang gmake
+USES=		compiler:c++17-lang gmake
 
 MAKE_ENV=	FXT_INSTALL="${INSTALL_DATA}"
 MAKEFILE=	makefile
-USE_CXXSTD=	c++11
 WRKSRC=		${WRKDIR}/fxt
 
 OPTIONS_DEFINE=	EXAMPLES
 
 post-install-EXAMPLES-on:
 	${MKDIR} ${STAGEDIR}${EXAMPLESDIR}
 	cd ${WRKSRC}/demo && ${COPYTREE_SHARE} . ${STAGEDIR}${EXAMPLESDIR}
 
 .include <bsd.port.mk>
diff --git a/math/fxt/distinfo b/math/fxt/distinfo
index 3bb0672ba010..558f52ebd608 100644
--- a/math/fxt/distinfo
+++ b/math/fxt/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1771421440
-SHA256 (fxt-2026.01.31.tar.gz) = 020214ad5358496f96d62aea64e68ac3a8f84d775ee1f49cb79c7ff0fcf03108
-SIZE (fxt-2026.01.31.tar.gz) = 1572966
+TIMESTAMP = 1779394323
+SHA256 (fxt-2026.05.19.tar.gz) = 0cb1b97d6783a1f12fdb6d312c3d273dd08b61149be396fc1e0233d63d1c4a20
+SIZE (fxt-2026.05.19.tar.gz) = 1572955
diff --git a/math/fxt/files/patch-makefile b/math/fxt/files/patch-makefile
index 54801d4c0521..1436ad72ba44 100644
--- a/math/fxt/files/patch-makefile
+++ b/math/fxt/files/patch-makefile
@@ -1,55 +1,29 @@
---- makefile.orig	2023-10-20 14:17:07 UTC
+--- makefile.orig	2026-05-19 14:06:34 UTC
 +++ makefile
-@@ -8,22 +8,22 @@ PROJ=fxt
+@@ -8,22 +8,22 @@ include flags.mk
  include flags.mk
  
  #### choose the FLAG combo here:
 -FXT_CXXFLAGS=
 +#FXT_CXXFLAGS=
  #FXT_CXXFLAGS += -std=c++11
--FXT_CXXFLAGS += -std=c++17
--FXT_CXXFLAGS += -pipe
-+#FXT_CXXFLAGS += -std=c++17
-+#FXT_CXXFLAGS += -pipe
+ FXT_CXXFLAGS += -std=c++17
+ FXT_CXXFLAGS += -pipe
  #FXT_CXXFLAGS += -fno-exceptions
 -FXT_CXXFLAGS += $(OFLAGS) # uncomment for OPTIMIZATION
 +#FXT_CXXFLAGS += $(OFLAGS) # uncomment for OPTIMIZATION
  #FXT_CXXFLAGS += -O3 # test -O3
--FXT_CXXFLAGS += $(GFLAGS) # uncomment for DEBUGGING
-+#FXT_CXXFLAGS += $(GFLAGS) # uncomment for DEBUGGING
+ #FXT_CXXFLAGS += $(GFLAGS) # uncomment for DEBUGGING
  #FXT_CXXFLAGS += $(PFLAGS) # uncomment for PROFILING
  #
 -FXT_CXXFLAGS += $(WFLAGS) # uncomment for WARNINGS
 +#FXT_CXXFLAGS += $(WFLAGS) # uncomment for WARNINGS
  #FXT_CXXFLAGS += -Werror # make all warnings ERRORS
  #FXT_CXXFLAGS += -fmax-errors=1 # clang chokes on this one
  
  #FXT_CXXFLAGS += -D__NO_MATH_INLINES
 -FXT_CXXFLAGS += $(FXT_EXTRA_FLAGS)
 +#FXT_CXXFLAGS += $(FXT_EXTRA_FLAGS)
  
  #FXT_CXXFLAGS += $(CLANG_FLAGS)  ## for clang++
  
-@@ -199,15 +199,15 @@ INCDIR=$(PREFIX)/include/fxt
- .PHONY: install  ## install to $(PREFIX)/lib/ and $(PREFIX)/include/fxt/
- install: lib
- 	: '[$@]'
--	@echo 'PREFIX=$(PREFIX)  LIBDIR=$(LIBDIR)  INCDIR=$(INCDIR)'
-+	@echo 'PREFIX=$(PREFIX)  LIBDIR=$(LIBDIR)  INCDIR=$(DESTDIR)$(INCDIR)'
- 	@:
--	@test -d $(INCDIR)  ||  mkdir $(INCDIR)
--	@$(FXT_INSTALL) $(FXTIDIR)/*.h $(INCDIR)/
--	@cd src && for f in $(SHFXTSRCDIRS); do mkdir -p $(INCDIR)/$$f; done
--	@cd src && for f in $(SHFXTSRCDIRS); do $(FXT_INSTALL) $$f/*.h $(INCDIR)/$$f; done
-+	@test -d $(DESTDIR)$(INCDIR)  ||  mkdir $(DESTDIR)$(INCDIR)
-+	@$(FXT_INSTALL) $(FXTIDIR)/*.h $(DESTDIR)$(INCDIR)/
-+	@cd src && for f in $(SHFXTSRCDIRS); do mkdir -p $(DESTDIR)$(INCDIR)/$$f; done
-+	@cd src && for f in $(SHFXTSRCDIRS); do $(FXT_INSTALL) $$f/*.h $(DESTDIR)$(INCDIR)/$$f; done
- 	@:
--	@test -d $(LIBDIR)  ||  mkdir $(LIBDIR)
--	@$(FXT_INSTALL) $(FXTLIB) $(LIBDIR)/
-+	@test -d $(DESTDIR)$(LIBDIR)  ||  mkdir $(DESTDIR)$(LIBDIR)
-+	@$(FXT_INSTALL) $(FXTLIB) $(DESTDIR)$(LIBDIR)/
- 	: '[$@ OK]'
- 
- .PHONY: chk-install ##x print whether installed header files are up to date