diff --git a/kubernetes/contrib/metallb-loadbalancer-inst/install-metallb-on-cluster.sh b/kubernetes/contrib/metallb-loadbalancer-inst/install-metallb-on-cluster.sh
index 44fe79a..bf2bc12 100755
--- a/kubernetes/contrib/metallb-loadbalancer-inst/install-metallb-on-cluster.sh
+++ b/kubernetes/contrib/metallb-loadbalancer-inst/install-metallb-on-cluster.sh
@@ -76,9 +76,11 @@
 	generate_config_map $@
 }
 
-if [[ $# -eq 1 ]] && [[ $1 = "-h" || $1 = "--help" ]]; then
+if [ $# -eq 1 ] && [ "$1" = "-h" ]; then
 	usage
-elif [[ $# -eq 0 ]]; then
+if [ $# -eq 1 ] && [ "$1" = "--help" ]; then
+	usage
+elif [ $# -eq 0 ]; then
 	automatic_configuration
 else
 	manual_configuration $@