diff --git a/helpers/helpers.v2.1.d/postgresql b/helpers/helpers.v2.1.d/postgresql
index 713743ec0..ffaeafbf3 100644
--- a/helpers/helpers.v2.1.d/postgresql
+++ b/helpers/helpers.v2.1.d/postgresql
@@ -81,6 +81,8 @@ ynh_psql_dump_db() {
 # | arg: pwd - the password to identify user by
 #
 ynh_psql_create_user() {
+    local user=$1
+    local pwd=$2
     sudo --login --user=postgres psql <<< "CREATE USER $user WITH ENCRYPTED PASSWORD '$pwd'"
 }