correct mn command
diff --git a/tutorial1-setup.sh b/tutorial1-setup.sh
index d1f67f9..45217a0 100644
--- a/tutorial1-setup.sh
+++ b/tutorial1-setup.sh
@@ -77,7 +77,7 @@
 Name=Mininet
 Name[en_US]=Mininet
 Icon=konsole
-Exec=/usr/bin/xterm -e 'sudo mn --custom ~/onos-next/tools/test/topos/tower.py --topo tower --controller remote,${1:-192.168.2.1} --mac'
+Exec=/usr/bin/xterm -e 'sudo mn --custom ~/onos-next/tools/test/topos/tower.py --topo tower --controller remote --mac'
 Comment[en_US]=
 EOF