diff --git a/dijkstra3d.pyx b/dijkstra3d.pyx
index a9281d9..c27744d 100644
--- a/dijkstra3d.pyx
+++ b/dijkstra3d.pyx
@@ -37,7 +37,7 @@ from libcpp.vector cimport vector
 cimport numpy as cnp
 import numpy as np
 
-np.import_array()
+cnp.import_array()
 
 import warnings