Index: /trunk/src/VBox/Additions/linux/installer/vboxadd-x11.sh
===================================================================
--- /trunk/src/VBox/Additions/linux/installer/vboxadd-x11.sh	(revision 58643)
+++ /trunk/src/VBox/Additions/linux/installer/vboxadd-x11.sh	(revision 58644)
@@ -256,4 +256,5 @@
         1.17.99.902 )
             # special case for Fedora 23 :-/
+            x_version_short="1.18"
             xserver_version="X.Org Server ${x_version_short}"
             vboxvideo_src=vboxvideo_drv_`echo ${x_version_short} | sed 's/\.//'`.so