diff --git a/metropolis/proto/api/BUILD.bazel b/metropolis/proto/api/BUILD.bazel
index f90885a..294dcb8 100644
--- a/metropolis/proto/api/BUILD.bazel
+++ b/metropolis/proto/api/BUILD.bazel
@@ -17,6 +17,7 @@
         "//osbase/logtree/proto:proto_proto",
         "//osbase/net/proto:net_proto_proto",
         "@protobuf//:duration_proto",
+        "@protobuf//:field_mask_proto",
     ],
 )