diff --git a/bin/v-get-database-credentials-of-domain b/bin/v-get-database-credentials-of-domain
index 71dcfe31..c32ef657 100644
--- a/bin/v-get-database-credentials-of-domain
+++ b/bin/v-get-database-credentials-of-domain
@@ -27,8 +27,7 @@ source /usr/local/vesta/func/main.sh
 #----------------------------------------------------------#
 
 check_args '1' "$#" 'DOMAIN [SUBFOLDER]'
-domain=$DOMAIN
-is_format_valid 'domain'
+is_domain_format_valid "$DOMAIN"
 
 USER=$(/usr/local/vesta/bin/v-search-domain-owner "$DOMAIN")
 if [ -z "$USER" ]; then