diff --git a/python/pyOFM.py b/python/pyOFM.py
index 4aea996..27d7105 100755
--- a/python/pyOFM.py
+++ b/python/pyOFM.py
@@ -13,6 +13,7 @@
 import shutil
 import numpy as np
 from mpi4py import MPI
+import gzip
 from .pyOFMesh import pyOFMesh
 try:
     from collections import OrderedDict