diff --git a/p4app/controller.py b/p4app/controller.py
index 6866883..0c2b7fc 100644
--- a/p4app/controller.py
+++ b/p4app/controller.py
@@ -57,10 +57,10 @@ class L2Controller(object):
 
     @staticmethod
     def add_host_ips(host, net, ipaddr, dev):
-        subprocess.run(["mx", host, "ip", "addr", "flush", "dev", dev])
-        subprocess.run(["mx", host, "sysctl", "net.ipv6.conf.lo.disable_ipv6=0"])
-        subprocess.run(["mx", host, "sysctl", "net.ipv6.conf.{}.disable_ipv6=0".format(dev)])
-        subprocess.run(["mx", host, "ip", "addr", "add", ipaddr, "dev", dev])
+        subprocess.call(["mx", host, "ip", "addr", "flush", "dev", dev])
+        subprocess.call(["mx", host, "sysctl", "net.ipv6.conf.lo.disable_ipv6=0"])
+        subprocess.call(["mx", host, "sysctl", "net.ipv6.conf.{}.disable_ipv6=0".format(dev)])
+        subprocess.call(["mx", host, "ip", "addr", "add", ipaddr, "dev", dev])
 
     def init_boilerplate(self, sw_name):
         self.topo = Topology(db="topology.db")