diff --git a/molSimplify/Scripts/structgen.py b/molSimplify/Scripts/structgen.py
index 1d516e84..bf72ae38 100644
--- a/molSimplify/Scripts/structgen.py
+++ b/molSimplify/Scripts/structgen.py
@@ -15,6 +15,7 @@
 import random
 import itertools
 import numpy as np
+import networkx as nx
 from typing import Any, List, Tuple, Dict, Union, Optional
 from argparse import Namespace
 from molSimplify.Scripts.distgeom import GetConf