diff --git a/app/nose/bin/help.ts b/app/nose/bin/help.ts
index d0ade0c..f5c6862 100644
--- a/app/nose/bin/help.ts
+++ b/app/nose/bin/help.ts
@@ -1,10 +1,12 @@
-// Show helpful information about a command. 
+// Show helpful information about a command.
 //
 // (Hopefully.)
 
 import { commandPath } from "@/commands"
 
 export default async function (cmd: string) {
+  if (!cmd) return "usage: help <command>"
+
   const path = commandPath(cmd)
   if (!path) throw `${cmd} not found`