diff --git a/setup/so-functions b/setup/so-functions
index d134a8ac8..fab24b2f2 100755
--- a/setup/so-functions
+++ b/setup/so-functions
@@ -1200,7 +1200,7 @@ manager_global() {
 		"  features: False"\
 		"elasticsearch:"\
 		"  replicas: 0"\
-		if [ -z "$ESCLUSTERNAME" ]; then 
+		if [[ -z "$ESCLUSTERNAME" ]]; then 
 		    printf "  true_cluster: False"
 		           "  true_cluster_name: 'so'"
 		else