diff --git a/graphics/khronos-texture/Makefile b/graphics/khronos-texture/Makefile
index d64027bf71e8..749c19354c79 100644
--- a/graphics/khronos-texture/Makefile
+++ b/graphics/khronos-texture/Makefile
@@ -1,40 +1,40 @@
 PORTNAME=	khronos-texture
 DISTVERSIONPREFIX=	v
 DISTVERSION=	4.4.2
 CATEGORIES=	graphics
 
 MAINTAINER=	vvd@FreeBSD.org
 COMMENT=	Khronos Texture is a container for textures for OpenGL/Vulkan/etc
 WWW=		https://github.com/KhronosGroup/KTX-Software
 
 LICENSE=	APACHE20
 
 BUILD_DEPENDS=	bash:shells/bash
 
-USES=		cmake compiler:c++11-lib python:build
+USES=		cmake compiler:c++14-lang python:build
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	KhronosGroup
 GH_PROJECT=	KTX-Software
 
 OPTIONS_DEFAULT_aarch64=	NEON
 OPTIONS_DEFAULT_amd64=		SSE2
 OPTIONS_DEFAULT_OTHER_ARCHS=	NONE
 OPTIONS_SINGLE=			SIMD
 OPTIONS_SINGLE_SIMD=		AVX2 NEON NONE SSE2 SSE41
 OPTIONS_EXCLUDE=		${${ARCH} != amd64 && ${ARCH} != i386:?AVX2 SSE2 SSE41:}
 OPTIONS_EXCLUDE+=		${${ARCH} != armv6 && ${ARCH} != armv7 && ${ARCH} != aarch64:?NEON:}
 
 AVX2_DESC=		Use the AVX2 instruction set
 NEON_DESC=		Use the NEON instruction set
 NONE_DESC=		Don't use any SIMD instructions
 SSE2_DESC=		Use the SSE2 instruction set
 SSE41_DESC=		Use the SSE4.1 instruction set
 
 AVX2_CMAKE_ON=		-DASTCENC_ISA_AVX2:BOOL=ON -DBASISU_SUPPORT_SSE:BOOL=ON
 NEON_CMAKE_ON=		-DASTCENC_ISA_NEON:BOOL=ON
 NONE_CMAKE_ON=		-DASTCENC_ISA_NONE:BOOL=ON -DBASISU_SUPPORT_SSE:BOOL=OFF
 SSE2_CMAKE_ON=		-DASTCENC_ISA_SSE2:BOOL=ON -DBASISU_SUPPORT_SSE:BOOL=OFF
 SSE41_CMAKE_ON=		-DASTCENC_ISA_SSE41:BOOL=ON -DBASISU_SUPPORT_SSE:BOOL=ON
 
 .include <bsd.port.mk>
diff --git a/graphics/khronos-texture/files/patch-external_fmt_include_fmt_format.h b/graphics/khronos-texture/files/patch-external_fmt_include_fmt_format.h
new file mode 100644
index 000000000000..1b362cc36d87
--- /dev/null
+++ b/graphics/khronos-texture/files/patch-external_fmt_include_fmt_format.h
@@ -0,0 +1,10 @@
+--- external/fmt/include/fmt/format.h.orig	2025-10-04 08:06:54 UTC
++++ external/fmt/include/fmt/format.h
+@@ -44,6 +44,7 @@
+ #  include <cmath>    // std::signbit
+ #  include <cstddef>  // std::byte
+ #  include <cstdint>  // uint32_t
++#  include <cstdlib>  // malloc/free
+ #  include <cstring>  // std::memcpy
+ #  include <limits>   // std::numeric_limits
+ #  include <new>      // std::bad_alloc