diff --git a/net/ipv4/Kconfig b/net/ipv4/Kconfig
index cbb505b..a51e33e 100644
--- a/net/ipv4/Kconfig
+++ b/net/ipv4/Kconfig
@@ -409,6 +409,10 @@
 	depends on INET_DIAG
 	def_tristate INET_DIAG
 
+config INET_UDP_DIAG
+	depends on INET_DIAG
+	def_tristate INET_DIAG
+
 menuconfig TCP_CONG_ADVANCED
 	bool "TCP: advanced congestion control"
 	---help---
diff --git a/net/ipv4/Makefile b/net/ipv4/Makefile
index f2dc69c..e9d98e6 100644
--- a/net/ipv4/Makefile
+++ b/net/ipv4/Makefile
@@ -34,6 +34,7 @@
 obj-$(CONFIG_NETFILTER)	+= netfilter.o netfilter/
 obj-$(CONFIG_INET_DIAG) += inet_diag.o 
 obj-$(CONFIG_INET_TCP_DIAG) += tcp_diag.o
+obj-$(CONFIG_INET_UDP_DIAG) += udp_diag.o
 obj-$(CONFIG_NET_TCPPROBE) += tcp_probe.o
 obj-$(CONFIG_TCP_CONG_BIC) += tcp_bic.o
 obj-$(CONFIG_TCP_CONG_CUBIC) += tcp_cubic.o