diff --git a/meta-poky/conf/distro/poky-altcfg.conf b/meta-poky/conf/distro/poky-altcfg.conf
index b6dbcad4ef..3d64bdd1fe 100644
--- a/meta-poky/conf/distro/poky-altcfg.conf
+++ b/meta-poky/conf/distro/poky-altcfg.conf
@@ -2,6 +2,8 @@
 # An example of subclassing a distro, primarily used for testing alternate configuration
 # combinations on the Yocto Project autobuilder
 #
+
+PACKAGE_CLASSES ?= "package_ipk"
 require conf/distro/poky.conf
 
 DISTRO = "poky-altcfg"