--- kernel-2.6.27.orig/net/Makefile
+++ kernel-2.6.27/net/Makefile
@@ -42,6 +42,7 @@
 obj-$(CONFIG_ATM)		+= atm/
 obj-$(CONFIG_DECNET)		+= decnet/
 obj-$(CONFIG_ECONET)		+= econet/
+obj-$(CONFIG_PHONET)		+= phonet/
 ifneq ($(CONFIG_VLAN_8021Q),)
 obj-y				+= 8021q/
 endif