diff --git a/src/ansys/mechanical/core/embedding/viz/usd_converter.py b/src/ansys/mechanical/core/embedding/viz/usd_converter.py
index 6ff85ebd1..1d7f41097 100644
--- a/src/ansys/mechanical/core/embedding/viz/usd_converter.py
+++ b/src/ansys/mechanical/core/embedding/viz/usd_converter.py
@@ -20,6 +20,8 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
+"""Converter to OpenUSD."""
+
 import typing
 
 import clr