diff --git a/scripts/upgrade b/scripts/upgrade
index e6441fe..59e530d 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -143,7 +143,7 @@ then
     # Fix warning "Your installation has no default phone region set"
     if [ "$(exec_occ config:system:get default_phone_region)" == "" ]; then
 	config_locale=$(exec_occ config:system:get default_locale)
-	if [ "$config_locale" == "" ]; then
+	if [ -z "$config_locale" ]; then
 		# If it's not set in config use "US" as default
 		country="US"
 	else