Index: /trunk/src/VBox/Additions/linux/installer/vboxadd-x11.sh
===================================================================
--- /trunk/src/VBox/Additions/linux/installer/vboxadd-x11.sh	(revision 43320)
+++ /trunk/src/VBox/Additions/linux/installer/vboxadd-x11.sh	(revision 43321)
@@ -328,4 +328,9 @@
             echo "installing the X.Org drivers."
             dox11config=""
+            ;;
+        1.13.* )
+            xserver_version="X.Org Server 1.13"
+            vboxvideo_src=vboxvideo_drv_113.so
+            test "$system" = "redhat" || setupxorgconf=""
             ;;
         1.12.* )