diff --git a/meta-phosphor/recipes-phosphor/interfaces/bmcweb_git.bb b/meta-phosphor/recipes-phosphor/interfaces/bmcweb_git.bb
index de34f77..35bd5b2 100644
--- a/meta-phosphor/recipes-phosphor/interfaces/bmcweb_git.bb
+++ b/meta-phosphor/recipes-phosphor/interfaces/bmcweb_git.bb
@@ -49,4 +49,4 @@
 USERADD_PARAM:${PN} = "-r -s /sbin/nologin bmcweb"
 
 GROUPADD_PARAM:${PN} = "web; redfish"
-FULL_OPTIMIZATION = "-Os "
+FULL_OPTIMIZATION:append = " -Os"