diff --git a/meta-ibm/recipes-phosphor/mboxd/mboxd_%.bbappend b/meta-ibm/recipes-phosphor/mboxd/mboxd_%.bbappend
index 0e35037..51c00e4 100644
--- a/meta-ibm/recipes-phosphor/mboxd/mboxd_%.bbappend
+++ b/meta-ibm/recipes-phosphor/mboxd/mboxd_%.bbappend
@@ -1,5 +1,6 @@
 MBOXD_FLASH_SIZE:ibm-ac-server = "64M"
 MBOXD_FLASH_SIZE:p10bmc = "64M"
+MBOXD_WINDOW_NUM:p10bmc = "63"
 
 FILESEXTRAPATHS:prepend := "${THISDIR}/${PN}:"