depends on NETFILTER_ADVANCED
--- a/net/netfilter/Makefile
+++ b/net/netfilter/Makefile
depends on NETFILTER_ADVANCED
--- a/net/netfilter/Makefile
+++ b/net/netfilter/Makefile
# connection tracking
obj-$(CONFIG_NF_CONNTRACK) += nf_conntrack.o
+# optional conntrack route cache extension
+obj-$(CONFIG_NF_CONNTRACK_RTCACHE) += nf_conntrack_rtcache.o
+
# connection tracking
obj-$(CONFIG_NF_CONNTRACK) += nf_conntrack.o
+# optional conntrack route cache extension
+obj-$(CONFIG_NF_CONNTRACK_RTCACHE) += nf_conntrack_rtcache.o
+