diff --git a/science/helfem/Makefile b/science/helfem/Makefile
index af210d8e0afd..123c6ba37158 100644
--- a/science/helfem/Makefile
+++ b/science/helfem/Makefile
@@ -1,27 +1,30 @@
 PORTNAME=	helfem
 DISTVERSION=	g20210912
 PORTREVISION=	3
 CATEGORIES=	science # chemistry
 
+PATCH_SITES=	https://github.com/${GH_ACCOUNT}/${GH_PROJECT}/commit/
+PATCHFILES=	4c0196c3ef3f254a22030eda787105c8a48df919.patch:-p1 # https://github.com/susilehtola/HelFEM/pull/7
+
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Finite element methods for electronic structure calculations
 
 LICENSE=	GPLv2
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 LIB_DEPENDS=	libarmadillo.so:math/armadillo \
 		libgsl.so:math/gsl \
 		libhdf5_cpp.so:science/hdf5 \
 		libsz.so:science/libaec \
 		libxc.so:science/libxc
 
 USES=		cmake fortran
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	susilehtola
 GH_PROJECT=	HelFEM
 GH_TAGNAME=	21461e9
 
 CMAKE_ON=	HELFEM_FIND_DEPS BUILD_SHARED_LIBS
 
 .include <bsd.port.mk>
diff --git a/science/helfem/distinfo b/science/helfem/distinfo
index d288399d72d8..dced120724b0 100644
--- a/science/helfem/distinfo
+++ b/science/helfem/distinfo
@@ -1,3 +1,5 @@
-TIMESTAMP = 1631463421
+TIMESTAMP = 1656098405
 SHA256 (susilehtola-HelFEM-g20210912-21461e9_GH0.tar.gz) = 08dde1f20ff741ca0befbc0472b0264f48be82e083fb4dd34927ef9cd7bffca6
 SIZE (susilehtola-HelFEM-g20210912-21461e9_GH0.tar.gz) = 1020779
+SHA256 (4c0196c3ef3f254a22030eda787105c8a48df919.patch) = 349f730515667da1a85d8646d282208ee26dc3c93a5fd0468dab06ad727593fc
+SIZE (4c0196c3ef3f254a22030eda787105c8a48df919.patch) = 573