diff --git a/src/mpMininetBuilder.py b/src/mpMininetBuilder.py
index 786cc2d..5309818 100644
--- a/src/mpMininetBuilder.py
+++ b/src/mpMininetBuilder.py
@@ -20,7 +20,7 @@ class MpMininetBuilder(Topo):
 		return stdout
 
 	def startNetwork(self):
-		self.net = Mininet(topo=self,link=TCLink,autoStaticArp=True)
+		self.net = Mininet(topo=self,link=TCLink,autoStaticArp=True,autoSetMacs=True)
 		self.net.start()
 
 	def getCLI(self):