diff --git a/vmcreate1.sh b/vmcreate1.sh
index 038b342..1c7a883 100644
--- a/vmcreate1.sh
+++ b/vmcreate1.sh
@@ -109,7 +109,7 @@ while getopts "a:f:hk:u:p:d:t:" opt; do
         p) password="$OPTARG";;
         d) size="$OPTARG";;
         t) tag=,"$OPTARG";;
-        *) echo "Invalid option. Use '-h' for help."; exit 1;;
+        \?) echo "Invalid option."; show_help; exit 1;;
 	esac
 done