diff --git a/science/elk/Makefile b/science/elk/Makefile
index 9054a5159fa6..dcca0f23473e 100644
--- a/science/elk/Makefile
+++ b/science/elk/Makefile
@@ -1,85 +1,86 @@
 PORTNAME=	elk
-DISTVERSION=	11.0.2
-PORTREVISION=	1
+DISTVERSION=	11.2.3
 CATEGORIES=	science
 MASTER_SITES=	SF/${PORTNAME}
 PKGNAMESUFFIX=	-chemistry
 DIST_SUBDIR=	${PORTNAME}${PKGNAMESUFFIX}
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	All-electron full-potential linearised augmented-planewave code
 WWW=		http://elk.sourceforge.net/
 
 LICENSE=	GPLv3
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 LIB_DEPENDS=	libblas.so:math/blas \
 		libblis.so:math/blis \
 		libfftw3.so:math/fftw3 \
 		libfftw3f.so:math/fftw3-float \
 		liblapack.so:math/lapack \
 		libopenblas.so:math/openblas \
 		libwannier90.so:science/wannier90 \
 		libxc.so:science/libxc
 
 USES=		fortran gmake tar:tgz
 
 BINARY_ALIAS=	make=${GMAKE}
 
+MAKE_ARGS=	FREEBSD_FILESDIR=${FILESDIR}
+
 LDFLAGS+=	${LOCALBASE}/lib/gcc${GCC_DEFAULT}/libgcc_s.so
 
 OPTIONS_DEFINE=		DOCS EXAMPLES NATIVE OPENMP
 OPTIONS_RADIO=		MPI
 OPTIONS_RADIO_MPI=	MPICH OPENMPI
 OPTIONS_DEFAULT=	OPENMP MPICH
 PARALLEL_DESC=		Enable parallelizations:
 
 NATIVE_MAKE_ARGS=	FFLAGS="${FFLAGS} -march=native -mtune=native"
 NATIVE_VARS=		FFLAGS="-march=native -mtune=native"
 
 OPENMP_VARS=		OPENMP_FLAGS=-fopenmp
 
 MPICH_USES=		mpi:mpich
 MPICH_MAKE_ARGS=	F90=${MPIF90}
 
 OPENMPI_USES=		mpi:openmpi
 OPENMPI_MAKE_ARGS=	F90=${MPIF90}
 
 PORTDOCS=		*
 PORTEXAMPLES=		*
 
 MAKE_JOBS_UNSAFE=	yes
 
 PLIST_FILES=		bin/${PORTNAME}
 
 .include <bsd.port.pre.mk>
 
 .if ${GCC_DEFAULT} >= 10
 # workaround for Type mismatch in argument 'cc' at (1); passed COMPLEX(8) to REAL(8)
 FCFLAGS+=	-fallow-argument-mismatch
 .endif
 
 post-patch:
 	@${SED} 's|%%GMAKE%%|${GMAKE}|; s|%%FC%%|${FC}|; \
 		s|%%FCFLAGS%%|${FCFLAGS}|; \
 		s|%%OPENMP_FLAGS%%|${OPENMP_FLAGS}|' \
 		< ${FILESDIR}/make.inc.in \
 		> ${WRKSRC}/make.inc
 
 do-install:
 	${INSTALL_PROGRAM} ${WRKSRC}/src/${PORTNAME} ${STAGEDIR}${PREFIX}/bin
 
 do-install-DOCS-on:
 	@${MKDIR} ${STAGEDIR}${DOCSDIR}
 	${INSTALL_DATA} ${WRKSRC}/docs/*.pdf ${STAGEDIR}${DOCSDIR}
 
 do-install-EXAMPLES-on:
 	@${MKDIR} ${STAGEDIR}${EXAMPLESDIR}
 	cd ${WRKSRC}/examples && ${COPYTREE_SHARE} . ${STAGEDIR}${EXAMPLESDIR}
 
 do-test: # several tests fail, see https://sourceforge.net/p/elk/discussion/897822/thread/5d7862dd8b/
 	@cd ${WRKSRC}/tests && ./test.sh
 
 # 1 test (test_024) fails, reported to dewhurst@mpi-halle.mpg.de on 2026-06-26 (before was: see https://sourceforge.net/p/elk/discussion/897820/thread/f7b5859624/)
 
 .include <bsd.port.post.mk>
diff --git a/science/elk/distinfo b/science/elk/distinfo
index b6d8b4bac77c..feec2c47e742 100644
--- a/science/elk/distinfo
+++ b/science/elk/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1785107220
-SHA256 (elk-chemistry/elk-11.0.2.tgz) = dbb1f94bc14fd3247080ac3e56ee28d5d8f65ef364bdd4bef2e0d63b8d81fa56
-SIZE (elk-chemistry/elk-11.0.2.tgz) = 2939423
+TIMESTAMP = 1790007042
+SHA256 (elk-chemistry/elk-11.2.3.tgz) = 7bd2c32d59ac6b2e6a1d605e6800f45fe0c505e3263e1f90fa2463c7c972421b
+SIZE (elk-chemistry/elk-11.2.3.tgz) = 2953381
diff --git a/science/elk/files/libxc_free.c b/science/elk/files/libxc_free.c
new file mode 100644
index 000000000000..4aa65b873e9d
--- /dev/null
+++ b/science/elk/files/libxc_free.c
@@ -0,0 +1,5 @@
+#include <stdlib.h>
+void libxc_free(void *ptr) {
+    free(ptr);
+}
+
diff --git a/science/elk/files/patch-src_Makefile b/science/elk/files/patch-src_Makefile
new file mode 100644
index 000000000000..d88989f675d1
--- /dev/null
+++ b/science/elk/files/patch-src_Makefile
@@ -0,0 +1,15 @@
+-- workaround for libxc removing libxc_free function
+
+--- src/Makefile.orig	2026-08-27 20:49:45 UTC
++++ src/Makefile
+@@ -241,7 +241,9 @@ elk:	$(OBJ)
+ # Targets
+ #-------------------------------------------------------------------------------
+ elk:	$(OBJ)
+-	$(F90) $(F90_OPTS) -o $(EXE) $(OBJ) $(F90_LIB) $(LIB_LIBXC) $(LIB_W90)
++	$(CC) -c $(FREEBSD_FILESDIR)/libxc_free.c -o libxc_free.o
++	$(F90) $(F90_OPTS) -o $(EXE) $(OBJ) $(F90_LIB) $(LIB_LIBXC) $(LIB_W90) \
++		libxc_free.o
+ 
+ all:	elk
+