diff --git a/conf/distro/include/phosphor-defaults.inc b/conf/distro/include/phosphor-defaults.inc
index 79d6c47..72fab7b 100644
--- a/conf/distro/include/phosphor-defaults.inc
+++ b/conf/distro/include/phosphor-defaults.inc
@@ -251,3 +251,4 @@
 PREFERRED_VERSION_phosphor-state-manager = "1.0"
 PREFERRED_VERSION_phosphor-ipmi-host = "1.0"
 PREFERRED_VERSION_phosphor-dbus-monitor = "1.0"
+PREFERRED_VERSION_mboxd = "1.0"