diff --git a/math/octave-forge-signal/Makefile b/math/octave-forge-signal/Makefile
index d42df18a0c5a..beb76890e1df 100644
--- a/math/octave-forge-signal/Makefile
+++ b/math/octave-forge-signal/Makefile
@@ -1,31 +1,31 @@
 # Created by: Stephen Montgomery-Smith <stephen@math.missouri.edu>
 
 PORTNAME=	octave-forge-signal
 PORTVERSION=	1.4.1
-PORTREVISION=	4
+PORTREVISION=	5
 CATEGORIES=	math
 
 MAINTAINER=	stephen@FreeBSD.org
 COMMENT=	Octave-forge package ${OCTAVE_PKGNAME}
 
 LICENSE=	GPLv3
 LICENSE_FILE=	${WRKDIR}/${OCTSRC}/COPYING
 
 # OCTSRC is the name of the directory of the package.
 # It is usually ${OCTAVE_PKGNAME} or ${DISTNAME}.
 OCTSRC=		${DISTNAME}
 
 WRKSRC=		${WRKDIR}/${OCTSRC}/src
 
 RUN_DEPENDS+=	${TARBALLS_DIR}/control.tar.gz:math/octave-forge-control
 
 .include "${.CURDIR}/../../Mk/bsd.octave.mk"
 
 post-patch:
 	${REINPLACE_CMD} s/-Wall// ${WRKSRC}/Makefile
 
 post-build:
 	${RM} ${WRKSRC}/Makefile ${WRKSRC}/configure
 	cd ${WRKDIR} && ${TAR} cfz ${DISTNAME}.tar.gz ${OCTSRC}
 
 .include <bsd.port.mk>
diff --git a/math/octave-forge-signal/files/patch-buffer.m b/math/octave-forge-signal/files/patch-buffer.m
new file mode 100644
index 000000000000..31f424f4160a
--- /dev/null
+++ b/math/octave-forge-signal/files/patch-buffer.m
@@ -0,0 +1,11 @@
+--- ../inst/buffer.m.orig	2022-04-08 21:56:59.940849000 -0500
++++ ../inst/buffer.m	2022-04-08 21:57:48.381303000 -0500
+@@ -120,7 +120,7 @@
+           endwhile
+           [i, j] = ind2sub([n-p, m], l);
+           if (all ([i, j] == [n-p, m]))
+-            off --;
++            off--;
+           endif
+           y (:, end - off + 2 : end) = [];
+         else