diff --git a/sharing/local_device_data/BUILD b/sharing/local_device_data/BUILD
index c3780926..8336d0cf 100644
--- a/sharing/local_device_data/BUILD
+++ b/sharing/local_device_data/BUILD
@@ -42,7 +42,6 @@ cc_library(
         "@com_google_absl//absl/status:statusor",
         "@com_google_absl//absl/strings",
         "@com_google_absl//absl/time",
-        "@com_google_protobuf//:protobuf",
     ],
 )
 
diff --git a/sharing/local_device_data/nearby_share_local_device_data_manager_impl.cc b/sharing/local_device_data/nearby_share_local_device_data_manager_impl.cc
index c99b950a..01dc86a0 100644
--- a/sharing/local_device_data/nearby_share_local_device_data_manager_impl.cc
+++ b/sharing/local_device_data/nearby_share_local_device_data_manager_impl.cc
@@ -24,7 +24,6 @@
 #include <utility>
 #include <vector>
 
-#include "google/protobuf/field_mask.pb.h"
 #include "absl/memory/memory.h"
 #include "absl/random/random.h"
 #include "absl/status/statusor.h"
@@ -44,6 +43,7 @@
 #include "sharing/internal/public/logging.h"
 #include "sharing/local_device_data/nearby_share_local_device_data_manager.h"
 #include "sharing/proto/device_rpc.pb.h"
+#include "sharing/proto/field_mask.pb.h"
 #include "sharing/proto/rpc_resources.pb.h"
 #include "sharing/scheduling/nearby_share_scheduler.h"
 #include "sharing/scheduling/nearby_share_scheduler_factory.h"
diff --git a/sharing/proto/BUILD b/sharing/proto/BUILD
index 89a4d2a9..30f5465d 100644
--- a/sharing/proto/BUILD
+++ b/sharing/proto/BUILD
@@ -24,14 +24,12 @@ proto_library(
         "contact_rpc.proto",
         "device_rpc.proto",
         "encrypted_metadata.proto",
+        "field_mask.proto",
         "rpc_resources.proto",
         "settings_observer_data.proto",
         "timestamp.proto",
     ],
     visibility = ["//visibility:public"],
-    deps = [
-        "@com_google_protobuf//:field_mask_proto",
-    ],
 )
 
 cc_proto_library(
diff --git a/sharing/proto/device_rpc.proto b/sharing/proto/device_rpc.proto
index 6bc7e046..c92198a4 100644
--- a/sharing/proto/device_rpc.proto
+++ b/sharing/proto/device_rpc.proto
@@ -16,7 +16,7 @@ syntax = "proto3";
 
 package nearby.sharing.proto;
 
-import "google/protobuf/field_mask.proto";
+import "sharing/proto/field_mask.proto";
 import "sharing/proto/rpc_resources.proto";
 
 option optimize_for = LITE_RUNTIME;
@@ -30,7 +30,7 @@ message UpdateDeviceRequest {
   // The FieldMask for updating specific columns in device table. For the
   // 'FieldMask' definition, see
   // https://developers.google.com/protocol-buffers/docs/reference/google.protobuf#fieldmask
-  google.protobuf.FieldMask update_mask = 2;
+  FieldMask update_mask = 2;
 }
 
 // The response for UpdateDeviceRequest.
diff --git a/sharing/proto/field_mask.proto b/sharing/proto/field_mask.proto
new file mode 100644
index 00000000..375ebd77
--- /dev/null
+++ b/sharing/proto/field_mask.proto
@@ -0,0 +1,24 @@
+// Copyright 2021 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+syntax = "proto3";
+
+package nearby.sharing.proto;
+
+option optimize_for = LITE_RUNTIME;
+
+message FieldMask {
+  // The set of field mask paths.
+  repeated string paths = 1;
+}