diff --git a/umap/umap_.py b/umap/umap_.py
index <HASH>..<HASH> 100644
--- a/umap/umap_.py
+++ b/umap/umap_.py
@@ -12,6 +12,7 @@ from sklearn.metrics import pairwise_distances
 
 import numpy as np
 import scipy.sparse
+import scipy.sparse.csgraph
 import numba
 
 import umap.distances as dist
Add an explicit import in case it didn't get otherwise included (as per #<I>)