diff --git a/meta-ibm/conf/machine/witherspoon.conf b/meta-ibm/conf/machine/witherspoon.conf
index b1d9ca2..9b8e3f1 100644
--- a/meta-ibm/conf/machine/witherspoon.conf
+++ b/meta-ibm/conf/machine/witherspoon.conf
@@ -38,5 +38,6 @@
 
 IMAGE_FEATURES:remove = "obmc-ikvm"
 
+QB_DEFAULT_FSTYPE:witherspoon = "ubi.mtd"
 QB_MACHINE:witherspoon = "-machine witherspoon-bmc"
 QB_MEM:witherspoon = "-m 512"