diff --git a/openmc/cmfd.py b/openmc/cmfd.py
index 792479c005..4fa9c9e8fd 100644
--- a/openmc/cmfd.py
+++ b/openmc/cmfd.py
@@ -17,7 +17,6 @@ import sys
 import time
 from ctypes import c_int
 import warnings
-import os.path
 
 import numpy as np
 from scipy import sparse