diff --git a/cpp/open3d/io/file_format/FileXYZ.cpp b/cpp/open3d/io/file_format/FileXYZ.cpp
index c8aa76a2b76..d2dc087be37 100644
--- a/cpp/open3d/io/file_format/FileXYZ.cpp
+++ b/cpp/open3d/io/file_format/FileXYZ.cpp
@@ -145,7 +145,7 @@ bool WritePointCloudInMemoryToXYZ(unsigned char *&buffer,
         }
         length = content.length();
         buffer = new unsigned char[length];  // we do this for the caller
-        memcpy(buffer, content.c_str(), length);
+        std::memcpy(buffer, content.c_str(), length);
 
         reporter.Finish();
         return true;
diff --git a/cpp/pybind/io/class_io.cpp b/cpp/pybind/io/class_io.cpp
index 671072fef0b..0602f93e577 100644
--- a/cpp/pybind/io/class_io.cpp
+++ b/cpp/pybind/io/class_io.cpp
@@ -183,7 +183,8 @@ void pybind_class_io(py::module &m_io) {
                 const char *dataptr = PYBIND11_BYTES_AS_STRING(bytes.ptr());
                 auto length = PYBIND11_BYTES_SIZE(bytes.ptr());
                 auto buffer = new unsigned char[length];
-                memcpy(buffer, dataptr, length);  // copy before releasing GIL
+                // copy before releasing GIL
+                std::memcpy(buffer, dataptr, length);
                 py::gil_scoped_release release;
                 geometry::PointCloud pcd;
                 ReadPointCloud(reinterpret_cast<const unsigned char *>(buffer),