diff --git a/src/cpp/ext/proto_server_reflection.cc b/src/cpp/ext/proto_server_reflection.cc
index f26f007..ceca602 100644
--- a/src/cpp/ext/proto_server_reflection.cc
+++ b/src/cpp/ext/proto_server_reflection.cc
@@ -116,7 +116,7 @@ Status ProtoServerReflection::GetFileByName(
   }

   const protobuf::FileDescriptor* file_desc =
-      descriptor_pool_->FindFileByName(file_name);
+      descriptor_pool_->FindFileByName(TProtoStringType(file_name));
   if (file_desc == nullptr) {
     return Status(StatusCode::NOT_FOUND, "File not found.");
   }
@@ -134,7 +134,7 @@ Status ProtoServerReflection::GetFileContainingSymbol(
   }
 
   const protobuf::FileDescriptor* file_desc =
-      descriptor_pool_->FindFileContainingSymbol(symbol);
+      descriptor_pool_->FindFileContainingSymbol(TProtoStringType(symbol));
   if (file_desc == nullptr) {
     return Status(StatusCode::NOT_FOUND, "Symbol not found.");
   }
@@ -175,7 +175,7 @@ Status ProtoServerReflection::GetAllExtensionNumbers(
   }
 
   const protobuf::Descriptor* desc =
-      descriptor_pool_->FindMessageTypeByName(type);
+      descriptor_pool_->FindMessageTypeByName(TProtoStringType(type));
   if (desc == nullptr) {
     return Status(StatusCode::NOT_FOUND, "Type not found.");
   }
@@ -199,7 +199,7 @@ void ProtoServerReflection::FillFileDescriptorResponse(
   seen_files->insert(file_desc->name());
 
   protobuf::FileDescriptorProto file_desc_proto;
-  TString data;
+  TProtoStringType data;
   file_desc->CopyTo(&file_desc_proto);
   file_desc_proto.SerializeToString(&data);
   response->mutable_file_descriptor_response()->add_file_descriptor_proto(data);