diff --git a/ciao-controller/controller.sh b/ciao-controller/controller.sh
index a184ffb..2af27f6 100755
--- a/ciao-controller/controller.sh
+++ b/ciao-controller/controller.sh
@@ -27,8 +27,8 @@ fi
 # Wait until keystone is ready
 source /root/ciaorc
 echo "Waiting keystone to start "
-until ciao-cli tenant list | grep service ; do
-    printf '.'
+until ciao-cli tenant list | grep service > /dev/null 2>&1 ; do
+    echo -n .
     sleep 1
 done
 # Starging ciao-controller