diff --git a/SimPEG/Regularization.py b/SimPEG/Regularization.py
index 7760f4f3..5318b7da 100644
--- a/SimPEG/Regularization.py
+++ b/SimPEG/Regularization.py
@@ -1,4 +1,4 @@
-import Utils, Maps, Parameters, numpy as np, scipy.sparse as sp
+import Utils, Maps, Mesh, Parameters, numpy as np, scipy.sparse as sp
 
 class BaseRegularization(object):
     """