diff --git a/compose/bin/setup-domain b/compose/bin/setup-domain
index e004eed29..c317e4270 100755
--- a/compose/bin/setup-domain
+++ b/compose/bin/setup-domain
@@ -5,7 +5,7 @@ set -o errexit
 
 DOMAIN=$1
 
-if ! grep -q $DOMAIN /etc/hosts; then
+if ! grep -q "$DOMAIN" /etc/hosts; then
     echo "Your system password is needed to add an entry to /etc/hosts..."
     echo "127.0.0.1 ::1 $DOMAIN" | sudo tee -a /etc/hosts
 fi