bridge-$(CONFIG_SYSFS) += br_sysfs_if.o br_sysfs_br.o
-bridge-$(CONFIG_BRIDGE_NETFILTER) += br_netfilter.o
+bridge-$(subst m,y,$(CONFIG_BRIDGE_NETFILTER)) += br_nf_core.o
+
+obj-$(CONFIG_BRIDGE_NETFILTER) += br_netfilter.o
bridge-$(CONFIG_BRIDGE_IGMP_SNOOPING) += br_multicast.o br_mdb.o