diff --git a/libvisual-0.4.0-better-altivec-detection.patch b/libvisual-0.4.0-better-altivec-detection.patch
new file mode 100644
index 0000000..4004ad9
--- /dev/null
+++ b/libvisual-0.4.0-better-altivec-detection.patch
@@ -0,0 +1,69 @@
+--- libvisual-0.4.0/libvisual/lv_cpu.c.orig	2006-01-22 13:23:37.000000000 +0000
++++ libvisual-0.4.0/libvisual/lv_cpu.c	2008-03-11 16:00:56.000000000 +0000
+@@ -50,8 +50,19 @@
+ #endif
+ 
+ #if defined(VISUAL_OS_LINUX)
++#if defined(VISUAL_ARCH_POWERPC)
++#include <sys/types.h>
++#include <sys/stat.h>
++#include <fcntl.h>
++#include <unistd.h>
++#include <stdio.h>
++
++#include <linux/auxvec.h>
++#include <asm/cputable.h>
++#else /* VISUAL_ARCH_POWERPC */
+ #include <signal.h>
+ #endif
++#endif
+ 
+ #if defined(VISUAL_OS_WIN32)
+ #include <windows.h>
+@@ -154,6 +165,46 @@ static void check_os_altivec_support( vo
+ 	if (err == 0)
+ 		if (has_vu != 0)
+ 			__lv_cpu_caps.hasAltiVec = 1;
++#elif defined (VISUAL_OS_LINUX)
++	static int available = -1;
++	int new_avail = 0;
++	char fname[64];
++	unsigned long buf[64];
++	ssize_t count;
++	pid_t pid;
++	int fd, i;
++
++	if (available != -1)
++		return;
++
++	pid = getpid();
++	snprintf(fname, sizeof(fname)-1, "/proc/%d/auxv", pid);
++
++	fd = open(fname, O_RDONLY);
++	if (fd < 0)
++		goto out;
++more:
++	count = read(fd, buf, sizeof(buf));
++	if (count < 0)
++		goto out_close;
++
++	for (i=0; i < (count / sizeof(unsigned long)); i += 2) {
++		if (buf[i] == AT_HWCAP) {
++			new_avail = !!(buf[i+1] & PPC_FEATURE_HAS_ALTIVEC);
++			goto out_close;
++		} else if (buf[i] == AT_NULL) {
++			goto out_close;
++		}
++	}
++
++	if (count == sizeof(buf))
++		goto more;
++out_close:
++	close(fd);
++out:
++	available = new_avail;
++	if (available)
++		__lv_cpu_caps.hasAltiVec = 1;
+ #else /* !VISUAL_OS_DARWIN */
+ 	/* no Darwin, do it the brute-force way */
+ 	/* this is borrowed from the libmpeg2 library */
diff --git a/libvisual.spec b/libvisual.spec
index 6497a59..0c8e283 100644
--- a/libvisual.spec
+++ b/libvisual.spec
@@ -12,6 +12,9 @@ Source0:        http://dl.sf.net/libvisual/libvisual-0.4.0.tar.gz
 BuildRoot:      %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 BuildRequires:  xorg-x11-proto-devel
 
+# https://bugzilla.redhat.com/show_bug.cgi?id=435771
+Patch0:         libvisual-0.4.0-better-altivec-detection.patch
+
 
 %description
 Libvisual is an abstraction library that comes between applications and
@@ -39,6 +42,7 @@ This package contains the files needed to build an application with libvisual.
 
 %prep
 %setup -q
+%patch0 -p1 -b .altivec-detection
 
 %build
 %ifarch i386
@@ -80,6 +84,9 @@ rm -rf $RPM_BUILD_ROOT
 
 
 %changelog
+* Tue Mar 11 2008 - Bastien Nocera <bnocera@redhat.com> - 0.4.0-6
+- Better Altivec detection, code from David Woodhouse
+
 * Mon Feb 18 2008 Fedora Release Engineering <rel-eng@fedoraproject.org> - 0.4.0-5
 - Autorebuild for GCC 4.3