diff --git a/templates/TEMPLATE.sh.tpl b/templates/TEMPLATE.sh.tpl
index c18fb86c02ac1a83c34232933730e1b61ea271b2..4df31c29bc173d2a0dab9b4646346eb258eb075b 100644
--- a/templates/TEMPLATE.sh.tpl
+++ b/templates/TEMPLATE.sh.tpl
@@ -131,7 +131,7 @@ debug=0
 quiet=0
 
 # If no arguments were given, just show usage help.
-if [[ -z \$1 ]]; then
+if [[ -z \${1-} ]]; then
     usage
     exit "$SUCCESS"
 fi