diff --git a/tools/test/cells/simon-uk4 b/tools/test/cells/simon-uk4
index 58ea829..5f81f64 100644
--- a/tools/test/cells/simon-uk4
+++ b/tools/test/cells/simon-uk4
@@ -37,7 +37,7 @@
 export ONOS_USER=sdn
 
 ## the apps we want activated at startup
-export ONOS_APPS="drivers,openflow,proxyarp,drivermatrix,mlb"
+export ONOS_APPS="gui,drivers,openflow,proxyarp,drivermatrix,mlb"
 
 ## mininet VM
 export OCN="192.168.56.99"