diff --git a/net/ipv4/Makefile b/net/ipv4/Makefile
index af7d2cf490fbd..fabbe46897cee 100644
--- a/net/ipv4/Makefile
+++ b/net/ipv4/Makefile
@@ -26,6 +26,7 @@ obj-$(CONFIG_IP_MROUTE) += ipmr.o
 obj-$(CONFIG_IP_MROUTE_COMMON) += ipmr_base.o
 obj-$(CONFIG_NET_IPIP) += ipip.o
 gre-y := gre_demux.o
+fou-y := fou_core.o
 obj-$(CONFIG_NET_FOU) += fou.o
 obj-$(CONFIG_NET_IPGRE_DEMUX) += gre.o
 obj-$(CONFIG_NET_IPGRE) += ip_gre.o
diff --git a/net/ipv4/fou.c b/net/ipv4/fou_core.c
similarity index 100%
rename from net/ipv4/fou.c
rename to net/ipv4/fou_core.c