diff --git a/src/objective-c/examples/Sample/RemoteTestClient/empty.proto b/src/objective-c/examples/Sample/RemoteTestClient/empty.proto
index b7ec9cb7cda..3b626ab1314 100644
--- a/src/objective-c/examples/Sample/RemoteTestClient/empty.proto
+++ b/src/objective-c/examples/Sample/RemoteTestClient/empty.proto
@@ -29,8 +29,12 @@
 
 syntax = "proto2";
 
+import "google/protobuf/objectivec-descriptor.proto";
+
 package grpc.testing;
 
+option (google.protobuf.objectivec_file_options).class_prefix = "RMT";
+
 // An empty message that you can re-use to avoid defining duplicated empty
 // messages in your project. A typical example is to use it as argument or the
 // return value of a service API. For instance:
diff --git a/src/objective-c/examples/Sample/RemoteTestClient/messages.proto b/src/objective-c/examples/Sample/RemoteTestClient/messages.proto
index b23e2efb0fb..ab8577401fc 100644
--- a/src/objective-c/examples/Sample/RemoteTestClient/messages.proto
+++ b/src/objective-c/examples/Sample/RemoteTestClient/messages.proto
@@ -31,8 +31,12 @@
 
 syntax = "proto2";
 
+import "google/protobuf/objectivec-descriptor.proto";
+
 package grpc.testing;
 
+option (google.protobuf.objectivec_file_options).class_prefix = "RMT";
+
 // The type of payload that should be returned.
 enum PayloadType {
   // Compressable text format.
diff --git a/src/objective-c/examples/Sample/RemoteTestClient/test.proto b/src/objective-c/examples/Sample/RemoteTestClient/test.proto
index 99fd75e021e..4b082205996 100644
--- a/src/objective-c/examples/Sample/RemoteTestClient/test.proto
+++ b/src/objective-c/examples/Sample/RemoteTestClient/test.proto
@@ -33,9 +33,12 @@ syntax = "proto2";
 
 import "empty.proto";
 import "messages.proto";
+import "google/protobuf/objectivec-descriptor.proto";
 
 package grpc.testing;
 
+option (google.protobuf.objectivec_file_options).class_prefix = "RMT";
+
 // A simple service to test the various types of RPCs and experiment with
 // performance with various types of payload.
 service TestService {