diff --git a/scripts/subinstallers/cockpit.sh b/scripts/subinstallers/cockpit.sh
index fbdb141..3df815a 100755
--- a/scripts/subinstallers/cockpit.sh
+++ b/scripts/subinstallers/cockpit.sh
@@ -16,7 +16,7 @@ fi
     
 sudo -E apt-get install -y cockpit
 
-if $(sudo apt-cache show cockpit-docker > /dev/null 2>&1) ; then
+if [ $(sudo apt-cache show cockpit-docker > /dev/null 2>&1) ]; then
     # no longer supported upstream in Ubuntu 20.04
     sudo -E apt-get install -y cockpit-docker
 fi