diff --git a/mesa-7.1-sis-ia64.patch b/mesa-7.1-sis-ia64.patch
new file mode 100644
index 0000000..a31f052
--- /dev/null
+++ b/mesa-7.1-sis-ia64.patch
@@ -0,0 +1,12 @@
+diff -up mesa-20071127/src/mesa/drivers/dri/sis/sis_context.h.broken mesa-20071127/src/mesa/drivers/dri/sis/sis_context.h
+--- mesa-20071127/src/mesa/drivers/dri/sis/sis_context.h.broken	2008-02-11 20:22:25.000000000 -0500
++++ mesa-20071127/src/mesa/drivers/dri/sis/sis_context.h	2008-02-11 20:23:38.000000000 -0500
+@@ -403,6 +403,8 @@ struct sis_context
+ 
+ #if defined(__i386__) || defined(__amd64__)
+ #define MMIO_WMB()	__asm __volatile("" : : : "memory")
++#elif defined (__ia64__)
++#define MMIO_WMB()	__asm __volatile ("mf" : : : "memory")
+ #else
+ #error platform needs WMB
+ #endif
diff --git a/mesa.spec b/mesa.spec
index 5a18053..ff3e603 100644
--- a/mesa.spec
+++ b/mesa.spec
@@ -35,7 +35,7 @@
 Summary: Mesa graphics libraries
 Name: mesa
 Version: 7.1
-Release: 0.9%{?dist}
+Release: 0.10%{?dist}
 License: MIT
 Group: System Environment/Libraries
 URL: http://www.mesa3d.org
@@ -55,6 +55,7 @@ Patch25: mesa-7.0-symlinks-before-depend.patch
 Patch26: mesa-7.1-remove-getid-i915.patch
 Patch27: mesa-7.1-e7221.patch
 Patch28: mesa-7.1-ia64-build-fix.patch
+Patch29: mesa-7.1-sis-ia64.patch
 
 BuildRequires: pkgconfig
 %if %{with_dri}
@@ -186,6 +187,7 @@ chmod a-x progs/demos/glslnoise.c
 %patch26 -p1 -b .fixi915
 %patch27 -p1 -b .e7221
 %patch28 -p1 -b .ia64
+%patch29 -p1 -b .sis
 
 # WARNING: The following files are copyright "Mark J. Kilgard" under the GLUT
 # license and are not open source/free software, so we remove them.
@@ -417,6 +419,9 @@ rm -rf $RPM_BUILD_ROOT
 %{_libdir}/mesa-demos-data
 
 %changelog
+* Tue Feb 12 2008 Adam Jackson <ajax@redhat.com> 7.1-0.10
+- mesa-7.1-sis-ia64.patch: Fix sis driver on ia64. (#432428)
+
 * Mon Feb 11 2008 Adam Jackson <ajax@redhat.com> 7.1-0.9
 - mesa-7.1-ia64-build-fix.patch: Fix build on ia64. (#427558)