diff --git a/pubsub/pstest/fake_test.go b/pubsub/pstest/fake_test.go
index 871dfd0a0625..1dbc3f4245cc 100644
--- a/pubsub/pstest/fake_test.go
+++ b/pubsub/pstest/fake_test.go
@@ -29,11 +29,11 @@ import (
 
 	"cloud.google.com/go/internal/testutil"
 	pb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
-	"google.golang.org/genproto/protobuf/field_mask"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
 	"google.golang.org/protobuf/types/known/durationpb"
+	field_mask "google.golang.org/protobuf/types/known/fieldmaskpb"
 	"google.golang.org/protobuf/types/known/timestamppb"
 )
 
diff --git a/pubsub/snapshot.go b/pubsub/snapshot.go
index 7a628b7bdbb2..d5d1dd2dfd74 100644
--- a/pubsub/snapshot.go
+++ b/pubsub/snapshot.go
@@ -21,7 +21,7 @@ import (
 	"time"
 
 	pb "cloud.google.com/go/pubsub/apiv1/pubsubpb"
-	fmpb "google.golang.org/genproto/protobuf/field_mask"
+	fmpb "google.golang.org/protobuf/types/known/fieldmaskpb"
 	"google.golang.org/protobuf/types/known/timestamppb"
 )
 
diff --git a/pubsub/subscription.go b/pubsub/subscription.go
index f08f1cbdb1eb..5a97305ef877 100644
--- a/pubsub/subscription.go
+++ b/pubsub/subscription.go
@@ -30,10 +30,10 @@ import (
 	"cloud.google.com/go/pubsub/internal/scheduler"
 	gax "github.com/googleapis/gax-go/v2"
 	"golang.org/x/sync/errgroup"
-	fmpb "google.golang.org/genproto/protobuf/field_mask"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
 	durpb "google.golang.org/protobuf/types/known/durationpb"
+	fmpb "google.golang.org/protobuf/types/known/fieldmaskpb"
 
 	vkit "cloud.google.com/go/pubsub/apiv1"
 )
diff --git a/pubsub/topic.go b/pubsub/topic.go
index a17f17b8674e..c4482982276c 100644
--- a/pubsub/topic.go
+++ b/pubsub/topic.go
@@ -34,12 +34,12 @@ import (
 	"go.opencensus.io/stats"
 	"go.opencensus.io/tag"
 	"google.golang.org/api/support/bundler"
-	fmpb "google.golang.org/genproto/protobuf/field_mask"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
 	"google.golang.org/protobuf/proto"
 	"google.golang.org/protobuf/types/known/durationpb"
+	fmpb "google.golang.org/protobuf/types/known/fieldmaskpb"
 )
 
 const (