diff --git a/include/fastdds/rtps/network/NetworkBuffer.hpp b/include/fastdds/rtps/network/NetworkBuffer.hpp
index f9f49db3e65..ba3fcfbd246 100644
--- a/include/fastdds/rtps/network/NetworkBuffer.hpp
+++ b/include/fastdds/rtps/network/NetworkBuffer.hpp
@@ -19,8 +19,7 @@
 #ifndef _FASTDDS_RTPS_NETWORK_NETWORKBUFFER_HPP
 #define _FASTDDS_RTPS_NETWORK_NETWORKBUFFER_HPP
 
-#include <cstdint>  // uint32_t
-#include <cstdlib>  // size_t
+#include <cstdint>
 #include <asio.hpp>
 
 namespace eprosima {
@@ -36,7 +35,7 @@ struct NetworkBuffer final
     //! Pointer to the buffer where the data is stored.
     const void* buffer;
     //! Number of bytes to use starting at @c buffer.
-    size_t size;
+    uint32_t size;
 
     NetworkBuffer(
             const void* ptr,
diff --git a/src/cpp/rtps/transport/test_UDPv4Transport.cpp b/src/cpp/rtps/transport/test_UDPv4Transport.cpp
index 6df9b8aac86..ddd3de53fdb 100644
--- a/src/cpp/rtps/transport/test_UDPv4Transport.cpp
+++ b/src/cpp/rtps/transport/test_UDPv4Transport.cpp
@@ -494,6 +494,7 @@ bool test_UDPv4Transport::log_drop(
         const std::list<NetworkBuffer>& buffers,
         uint32_t size)
 {
+    uint32_t total_size = size;
     if (test_UDPv4Transport_DropLog.size() < test_UDPv4Transport_DropLogLength)
     {
         vector<octet> message;
@@ -502,7 +503,7 @@ bool test_UDPv4Transport::log_drop(
             auto byte_data = static_cast<const octet*>(buf.buffer);
             message.insert(message.end(), byte_data, byte_data + buf.size);
         }
-        assert(message.size() == size);
+        assert(message.size() == total_size);
         test_UDPv4Transport_DropLog.push_back(message);
         return true;
     }