diff --git a/core/topo.py b/core/topo.py
index 12a0b81..d6f33a7 100644
--- a/core/topo.py
+++ b/core/topo.py
@@ -451,7 +451,7 @@ class TopoConfig(object):
         """
         Disable TSO on all interfaces
         """
-        for node in [self.get_host(n) for n in self.topo.topo_builder.net]:
+        for node in [self.topo.get_host(n) for n in self.topo.topo_builder.net]:
             for intf in self.topo.get_interface_names(node):
                 logging.info("Disable TSO on interface {}".format(intf))
                 cmd = "ethtool -K {} tso off".format(intf)