diff --git a/biology/jellyfish/Makefile b/biology/jellyfish/Makefile
index 9937ac96c1b2..4079f92b3c4f 100644
--- a/biology/jellyfish/Makefile
+++ b/biology/jellyfish/Makefile
@@ -1,42 +1,43 @@
 PORTNAME=		Jellyfish
 DISTVERSIONPREFIX=	v
 DISTVERSION=		2.3.0
+PORTREVISION=		1
 CATEGORIES=		biology
 
 MAINTAINER=	jwb@FreeBSD.org
 COMMENT=	Fast, memory-efficient counting of k-mers in DNA
 
 LICENSE=	GPLv3+
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 BUILD_DEPENDS=	yaggo:devel/yaggo
 LIB_DEPENDS=	libhts.so:biology/htslib
 
 USES=		autoreconf compiler:c++11-lib gmake libtool pathfix pkgconfig
 USE_LDCONFIG=	yes
 USE_GITHUB=	yes
 
 GNU_CONFIGURE=	yes
 GH_ACCOUNT=	gmarcais
 
 INSTALL_TARGET=	install-strip
 PLIST_SUB=	VER=${PORTVERSION}
 
 OPTIONS_DEFINE=		NLS
 OPTIONS_SUB=		yes
 
 NLS_USES=		gettext
 NLS_CONFIGURE_ENABLE=	nls
 
 .include <bsd.port.pre.mk>
 
 # SSE code assumes amd64 features
 .if ${ARCH} != "amd64"
 CONFIGURE_ARGS+=--without-sse
 .endif
 
 .if ${CHOSEN_COMPILER_TYPE} == gcc
 CXXFLAGS+=	-faligned-new
 .endif
 
 .include <bsd.port.post.mk>
diff --git a/biology/jellyfish/files/patch-include_jellyfish_dumper.hpp b/biology/jellyfish/files/patch-include_jellyfish_dumper.hpp
new file mode 100644
index 000000000000..2e064ad17f08
--- /dev/null
+++ b/biology/jellyfish/files/patch-include_jellyfish_dumper.hpp
@@ -0,0 +1,11 @@
+--- include/jellyfish/dumper.hpp.orig	2021-09-11 12:09:13 UTC
++++ include/jellyfish/dumper.hpp
+@@ -54,7 +54,7 @@ class dumper_t { (protected)
+     }
+     file_names_.push_back(name.str());
+ 
+-    out.open(name.str().c_str());
++    out.open(name.str().c_str(), mode);
+     if(out.fail())
+       throw ErrorWriting(err::msg() << "'" << name.str() << "': "
+                          << "Can't open file for writing" << err::no);