diff --git a/docs/BUILD b/docs/BUILD
index bd989fee..908e3a6f 100644
--- a/docs/BUILD
+++ b/docs/BUILD
@@ -66,6 +66,7 @@ proto_library(
         "//envoy/config/filter/network/zookeeper_proxy/v1alpha1:pkg",
         "//envoy/config/filter/thrift/rate_limit/v2alpha1:pkg",
         "//envoy/config/filter/thrift/router/v2alpha1:pkg",
+        "//envoy/config/filter/udp/udp_proxy/v2alpha:pkg",
         "//envoy/config/grpc_credential/v2alpha:pkg",
         "//envoy/config/health_checker/redis/v2:pkg",
         "//envoy/config/listener/v2:pkg",
diff --git a/envoy/config/filter/udp/udp_proxy/v2alpha/udp_proxy.proto b/envoy/config/filter/udp/udp_proxy/v2alpha/udp_proxy.proto
index 68603f38..c91420b2 100644
--- a/envoy/config/filter/udp/udp_proxy/v2alpha/udp_proxy.proto
+++ b/envoy/config/filter/udp/udp_proxy/v2alpha/udp_proxy.proto
@@ -10,7 +10,9 @@ import "google/protobuf/duration.proto";
 
 import "validate/validate.proto";
 
-// TODO(mattklein123): docs
+// [#protodoc-title: UDP proxy]
+// UDP proxy :ref:`configuration overview <config_udp_listener_filters_udp_proxy>`.
+// [#extension: envoy.filters.udp_listener.udp_proxy]
 
 // Configuration for the UDP proxy filter.
 message UdpProxyConfig {