diff --git a/pkg/unbound/docker-entrypoint.sh b/pkg/unbound/docker-entrypoint.sh
index 7db45e9..a358120 100755
--- a/pkg/unbound/docker-entrypoint.sh
+++ b/pkg/unbound/docker-entrypoint.sh
@@ -2,9 +2,9 @@
 
 set -e
 
-if [ `which unbound-$1 2>/dev/null` ]; then
+if [ `which "unbound-$1" 2>/dev/null` ]; then
   set -- unbound-"$@"
-elif [ ! `which $1 2>/dev/null` ]; then
+elif [ ! `which "$1" 2>/dev/null` ]; then
   set -- unbound -dv "$@"
 fi