diff --git a/examples/tree1024.py b/examples/tree1024.py
index 3c96770e211a281bec2f3cd9c2e3ec075e1886a6..e7abd7eb9b5ed73ce6e689f2f8c4c30dfe78a01d 100755
--- a/examples/tree1024.py
+++ b/examples/tree1024.py
@@ -7,7 +7,7 @@
 and running sysctl -p.
 """
    
-from mininet import init, TreeNet
+from mininet import init, TreeNet, Cli
 
 if __name__ == '__main__':
    init()