diff --git a/google/cloud/dialogflow/v2/entity_type.proto b/google/cloud/dialogflow/v2/entity_type.proto
index 0c7f4edf..969dff0a 100644
--- a/google/cloud/dialogflow/v2/entity_type.proto
+++ b/google/cloud/dialogflow/v2/entity_type.proto
@@ -169,6 +169,10 @@ service EntityTypes {
     };
     option (google.api.method_signature) = "parent,entities";
     option (google.api.method_signature) = "parent,entities,language_code";
+    option (google.longrunning.operation_info) = {
+      response_type: "google.protobuf.Empty"
+      metadata_type: "google.protobuf.Struct"
+    };
   }
 
   // Deletes entities in the specified entity type.
@@ -181,6 +185,10 @@ service EntityTypes {
     };
     option (google.api.method_signature) = "parent,entity_values";
     option (google.api.method_signature) = "parent,entity_values,language_code";
+    option (google.longrunning.operation_info) = {
+      response_type: "google.protobuf.Empty"
+      metadata_type: "google.protobuf.Struct"
+    };
   }
 }