diff --git a/xen/Makefile b/xen/Makefile
index 2536492268..bb64e08c91 100644
--- a/xen/Makefile
+++ b/xen/Makefile
@@ -2,8 +2,8 @@
 # This is the correct place to edit the build version.
 # All other places this is stored (eg. compile.h) should be autogenerated.
 export XEN_VERSION       = 2
-export XEN_SUBVERSION    = 0
-export XEN_EXTRAVERSION  = ""
+export XEN_SUBVERSION    = 1
+export XEN_EXTRAVERSION  = "-devel"
 
 export BASEDIR          := $(shell pwd)