diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h
index 18da0af6192f..d04ddf2f80da 100644
--- a/include/net/net_namespace.h
+++ b/include/net/net_namespace.h
@@ -10,6 +10,7 @@
 
 #include <net/netns/unix.h>
 #include <net/netns/packet.h>
+#include <net/netns/ipv4.h>
 
 struct proc_dir_entry;
 struct net_device;
@@ -46,6 +47,7 @@ struct net {
 
 	struct netns_packet	packet;
 	struct netns_unix	unx;
+	struct netns_ipv4	ipv4;
 };
 
 #ifdef CONFIG_NET
diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h
new file mode 100644
index 000000000000..ce830d57c35c
--- /dev/null
+++ b/include/net/netns/ipv4.h
@@ -0,0 +1,9 @@
+/*
+ * ipv4 in net namespaces
+ */
+
+#ifndef __NETNS_IPV4_H__
+#define __NETNS_IPV4_H__
+struct netns_ipv4 {
+};
+#endif