diff --git a/libmpeg2/PKGBUILD b/libmpeg2/PKGBUILD
index 32503695ad..d0cafd12b0 100644
--- a/libmpeg2/PKGBUILD
+++ b/libmpeg2/PKGBUILD
@@ -5,22 +5,25 @@ pkgname=libmpeg2
 pkgver=0.5.1
 pkgrel=7
 pkgdesc="Library for decoding MPEG-1 and MPEG-2 video streams."
-arch=('x86_64' 'powerpc64le')
+arch=('x86_64' 'powerpc64le' 'powerpc' 'riscv64')
 url="http://libmpeg2.sourceforge.net/"
 depends=('glibc')
 makedepends=('sdl' 'libxv')
 optdepends=('sdl: required for mpeg2dec'
             'libxv: required for mpeg2dec')
 source=(http://libmpeg2.sourceforge.net/files/${pkgname}-${pkgver}.tar.gz
-        libmpeg2-0.5.1-gcc4.6.patch)
+        libmpeg2-0.5.1-gcc4.6.patch
+        altivec.patch)
 license=('GPL2')
 provides=('mpeg2dec')
 sha256sums=('dee22e893cb5fc2b2b6ebd60b88478ab8556cb3b93f9a0d7ce8f3b61851871d4'
-            '763e188eea36ee3cdfb31e7877bbead00676b5766c25175ec6a7eb20884926d1')
+            '763e188eea36ee3cdfb31e7877bbead00676b5766c25175ec6a7eb20884926d1'
+            'a83d5652cad9ff93c814bf28cfe01ae2c2f59c6051dc1094f1cd538f71716143')
 
 prepare() {
   cd "${srcdir}/${pkgname}-${pkgver}"
   patch -Np1 -i "${srcdir}/libmpeg2-0.5.1-gcc4.6.patch"
+  patch -Np1 -i "${srcdir}/altivec.patch"
 
   sed '/AC_PATH_XTRA/d' -i configure.ac
   autoreconf --force --install
diff --git a/libmpeg2/altivec.patch b/libmpeg2/altivec.patch
new file mode 100644
index 0000000000..bd31a94518
--- /dev/null
+++ b/libmpeg2/altivec.patch
@@ -0,0 +1,53 @@
+# --- T2-COPYRIGHT-NOTE-BEGIN ---
+# This copyright note is auto-generated by scripts/Create-CopyPatch.
+# 
+# T2 SDE: package/.../libmpeg2/altivec.patch
+# Copyright (C) 2020 The T2 SDE Project
+# 
+# More information can be found in the files COPYING and README.
+# 
+# This patch file is dual-licensed. It is available under the license the
+# patched project is licensed under, as long as it is an OpenSource license
+# as defined at http://www.opensource.org/ (e.g. BSD, X11) or under the terms
+# of the GNU General Public License as published by the Free Software
+# Foundation; either version 2 of the License, or (at your option) any later
+# version.
+# --- T2-COPYRIGHT-NOTE-END ---
+
+--- a/configure.ac.bak	2010-05-25 17:12:14.756245990 +0000
++++ b/configure.ac	2010-05-25 17:11:51.629581723 +0000
+@@ -79,11 +79,10 @@
+ 		 CFLAGS="$OPT_CFLAGS $TRY_CFLAGS $CFLAGS"
+ 		 AC_MSG_CHECKING([if <altivec.h> is needed])
+ 		 AC_TRY_COMPILE([],
+-		    [typedef vector int t;
+-		     vec_ld(0, (unsigned char *)0);],
++		    [vector int t; t = vec_add(t,t);],
+ 		    [have_altivec=yes; AC_MSG_RESULT(no)],
+ 		    [AC_TRY_COMPILE([#include <altivec.h>],
+-			[typedef vector int t; vec_ld(0, (unsigned char *)0);],
++			[vector int t; t = vec_add(t,t);],
+ 			[AC_DEFINE([HAVE_ALTIVEC_H],,
+ 			    [Define to 1 if you have the <altivec.h> header.])
+ 			 have_altivec=yes; AC_MSG_RESULT(yes)],
+--- a/configure.vanilla	2020-03-18 22:39:38.000000000 +0100
++++ b/configure	2020-03-18 22:41:50.000000000 +0100
+@@ -4984,8 +4984,7 @@
+ int
+ main ()
+ {
+-typedef vector int t;
+-		     vec_ld(0, (unsigned char *)0);
++		     vector int t; t = vec_add(t,t);
+   ;
+   return 0;
+ }
+@@ -5023,7 +5022,7 @@
+ int
+ main ()
+ {
+-typedef vector int t; vec_ld(0, (unsigned char *)0);
++vector t; t = vec_add(t,t);
+   ;
+   return 0;
+ }