diff --git a/GPy/util/cluster_with_offset.py b/GPy/util/cluster_with_offset.py
index 0c6c8c2c..32840a87 100644
--- a/GPy/util/cluster_with_offset.py
+++ b/GPy/util/cluster_with_offset.py
@@ -3,7 +3,6 @@
 
 import GPy
 import numpy as np
-import sys #so I can print dots
 
 def add_index_column(inputs,data,clust):