diff --git a/build_pxe_ramdisk.sh b/build_pxe_ramdisk.sh
index feba18e..63e2ed4 100755
--- a/build_pxe_ramdisk.sh
+++ b/build_pxe_ramdisk.sh
@@ -17,6 +17,9 @@
 
 DEST=${DEST:-/opt/stack}
 
+# Option to use the version of devstack on which we are currently working
+USE_CURRENT_DEVSTACK=${USE_CURRENT_DEVSTACK:-1}
+
 # clean install of natty
 if [ ! -d $CHROOTCACHE/natty-base ]; then
     $PROGDIR/make_image.sh -C natty $CHROOTCACHE/natty-base