diff --git a/catalyst-testing/PKGBUILD b/catalyst-testing/PKGBUILD
index e8947af71..3e5114f5e 100644
--- a/catalyst-testing/PKGBUILD
+++ b/catalyst-testing/PKGBUILD
@@ -25,11 +25,12 @@ replaces=('catalyst')
 install=catalyst.install
 source=(http://www.ati-forum.de/files/Downloads/Driver/ati-driver-installer-8.783_RC1-x86.x86_64.rar
     #http://www2.ati.com/drivers/linux/ati-driver-installer-${pkgver/./-}-x86.x86_64.run
-    catalyst.sh amdcccle.desktop atieventsd.sh)
+    catalyst.sh amdcccle.desktop atieventsd.sh makefile_compat.patch)
 md5sums=('7c3e11ab4ebec6132a578ffe8f2915f9'
          'bdafe749e046bfddee2d1c5e90eabd83'
          '4efa8414a8fe9eeb50da38b5522ef81d'
-         'f729bf913613f49b0b9759c246058a87')
+         'f729bf913613f49b0b9759c246058a87'
+         '3e1b82bd69774ea808da69c983d6a43b')
 
 build() {
 
@@ -44,6 +45,10 @@ unrar e ati-driver-installer-8.783_RC1-x86.x86_64.rar
 if [ "${CARCH}" = "x86_64" ]; then
 BUILDARCH=x86_64
 _archdir=x86_64
+
+# patch makefile
+cd "${srcdir}/archive_files"
+patch -Np1 -i makefile_compat.patch || return 1
 fi
 if [ "${CARCH}" = "i686" ]; then
 BUILDARCH=i386
diff --git a/catalyst-testing/makefile_compat.patch b/catalyst-testing/makefile_compat.patch
new file mode 100644
index 000000000..defa3d8d8
--- /dev/null
+++ b/catalyst-testing/makefile_compat.patch
@@ -0,0 +1,10 @@
+--- 10.10/common/lib/modules/fglrx/build_mod/2.6.x/Makefile	2010-09-22 09:15:33.000000000 +0200
++++ 10.10/common/lib/modules/fglrx/build_mod/2.6.x/Makefile	2010-10-01 17:57:21.057820899 +0200
+@@ -66,6 +66,7 @@
+                 -DFGL_GART_RESERVED_SLOT \
+                 -DFGL_LINUX253P1_VMA_API \
+                 -DPAGE_ATTR_FIX=$(PAGE_ATTR_FIX) \
++                -DCOMPAT_ALLOC_USER_SPACE=$(COMPAT_ALLOC_USER_SPACE) \
+ 
+ ifeq ($(KERNELRELEASE),)
+ # on first call from remote location we get into this path