diff --git a/poky/meta/classes/extrausers.bbclass b/poky/meta/classes/extrausers.bbclass
index 90811bf..a8ef660 100644
--- a/poky/meta/classes/extrausers.bbclass
+++ b/poky/meta/classes/extrausers.bbclass
@@ -14,10 +14,10 @@
 
 inherit useradd_base
 
-PACKAGE_INSTALL_append = " ${@['', 'base-passwd shadow'][bool(d.getVar('EXTRA_USERS_PARAMS'))]}"
+PACKAGE_INSTALL:append = " ${@['', 'base-passwd shadow'][bool(d.getVar('EXTRA_USERS_PARAMS'))]}"
 
 # Image level user / group settings
-ROOTFS_POSTPROCESS_COMMAND_append = " set_user_group;"
+ROOTFS_POSTPROCESS_COMMAND:append = " set_user_group;"
 
 # Image level user / group settings
 set_user_group () {