diff --git a/examples/HelloWorldExampleDS/HelloWorldPubSubTypes.hpp b/examples/HelloWorldExampleDS/HelloWorldPubSubTypes.hpp
index 70e4cd9..c9b0647 100644
--- a/examples/HelloWorldExampleDS/HelloWorldPubSubTypes.hpp
+++ b/examples/HelloWorldExampleDS/HelloWorldPubSubTypes.hpp
@@ -112,6 +112,8 @@ class HelloWorldPubSubType : public eprosima::fastdds::dds::TopicDataType
 
 #endif  // TOPIC_DATA_TYPE_API_HAS_CONSTRUCT_SAMPLE
 
+private:
+
     eprosima::fastdds::MD5 md5_;
     unsigned char* key_buffer_;
 
diff --git a/resources/static_types/HelloWorldPubSubTypes.hpp b/resources/static_types/HelloWorldPubSubTypes.hpp
index 70e4cd9..c9b0647 100644
--- a/resources/static_types/HelloWorldPubSubTypes.hpp
+++ b/resources/static_types/HelloWorldPubSubTypes.hpp
@@ -112,6 +112,8 @@ class HelloWorldPubSubType : public eprosima::fastdds::dds::TopicDataType
 
 #endif  // TOPIC_DATA_TYPE_API_HAS_CONSTRUCT_SAMPLE
 
+private:
+
     eprosima::fastdds::MD5 md5_;
     unsigned char* key_buffer_;