--- /usr/portage/x11-proto/xcb-proto/xcb-proto-1.8-r3.ebuild	
+++ /usr/portage/x11-proto/xcb-proto/xcb-proto-1.8-r3.ebuild	
@@ -22,6 +22,11 @@ 
 DEPEND="${RDEPEND}
        dev-libs/libxml2"
 
+src_prepare() {
+    cd ${S}/xcbgen
+       epatch "${FILESDIR}/1.8-r3-fix-expression-len.patch" 
+}
+
 src_configure() {
        xorg-2_src_configure
        #Note: multilib is not supported with python, therefore use only one ABI