diff --git a/mininet/topo.py b/mininet/topo.py
index 404833a..55eab60 100644
--- a/mininet/topo.py
+++ b/mininet/topo.py
@@ -16,7 +16,7 @@ setup for testing, and can even be emulated with the Mininet package.
 # from networkx.classes.graph import Graph
 
 from networkx import Graph
-from mininet.node import SWITCH_PORT_BASE, Host, OVSSwitch
+from mininet.node import SWITCH_PORT_BASE
 
 
 class NodeID(object):