diff --git a/internal/compatibility/proto/request.go b/internal/compatibility/proto/request.go
index 3c4521ccc..6d07e79a2 100644
--- a/internal/compatibility/proto/request.go
+++ b/internal/compatibility/proto/request.go
@@ -223,6 +223,7 @@ func RegisterDomainRequest(t *shared.RegisterDomainRequest) *apiv1.RegisterDomai
 		WorkflowExecutionRetentionPeriod: daysToDuration(t.WorkflowExecutionRetentionPeriodInDays),
 		Clusters:                         ClusterReplicationConfigurationArray(t.Clusters),
 		ActiveClusterName:                t.GetActiveClusterName(),
+		ActiveClustersByRegion:           t.GetActiveClustersByRegion(),
 		Data:                             t.Data,
 		SecurityToken:                    t.GetSecurityToken(),
 		IsGlobalDomain:                   t.GetIsGlobalDomain(),
diff --git a/internal/compatibility/testdata/domain.go b/internal/compatibility/testdata/domain.go
index 7bcebadc7..80a40e99a 100644
--- a/internal/compatibility/testdata/domain.go
+++ b/internal/compatibility/testdata/domain.go
@@ -88,4 +88,8 @@ var (
 	ClusterReplicationConfigurationArray = []*apiv1.ClusterReplicationConfiguration{
 		&ClusterReplicationConfiguration,
 	}
+	ActiveClustersByRegion = map[string]string{
+		"Region1": ClusterName1,
+		"Region2": ClusterName2,
+	}
 )
diff --git a/internal/compatibility/testdata/service.go b/internal/compatibility/testdata/service.go
index d78a4965a..4d6379ba2 100644
--- a/internal/compatibility/testdata/service.go
+++ b/internal/compatibility/testdata/service.go
@@ -34,6 +34,7 @@ var (
 		WorkflowExecutionRetentionPeriod: DomainRetention,
 		Clusters:                         ClusterReplicationConfigurationArray,
 		ActiveClusterName:                ClusterName1,
+		ActiveClustersByRegion:           ActiveClustersByRegion,
 		Data:                             DomainData,
 		SecurityToken:                    SecurityToken,
 		IsGlobalDomain:                   true,
diff --git a/internal/compatibility/thrift/request.go b/internal/compatibility/thrift/request.go
index 474599423..4ba9932f8 100644
--- a/internal/compatibility/thrift/request.go
+++ b/internal/compatibility/thrift/request.go
@@ -226,6 +226,7 @@ func RegisterDomainRequest(t *apiv1.RegisterDomainRequest) *shared.RegisterDomai
 		WorkflowExecutionRetentionPeriodInDays: durationToDays(t.WorkflowExecutionRetentionPeriod),
 		Clusters:                               ClusterReplicationConfigurationArray(t.Clusters),
 		ActiveClusterName:                      &t.ActiveClusterName,
+		ActiveClustersByRegion:                 t.ActiveClustersByRegion,
 		Data:                                   t.Data,
 		SecurityToken:                          &t.SecurityToken,
 		IsGlobalDomain:                         &t.IsGlobalDomain,