diff --git a/ubot/modules/howdoi.py b/ubot/modules/howdoi.py
index 8ddcf56..7da63f6 100644
--- a/ubot/modules/howdoi.py
+++ b/ubot/modules/howdoi.py
@@ -11,6 +11,10 @@ ldr = micro_bot.loader
 
 @ldr.add("hdi")
 async def howdoi_cmd(event):
+    if not event.args:
+        await event.reply(f"`Syntax: {ldr.settings.get_config('cmd_prefix') or '.'}hdi <question>`")
+        return
+
     response = howdoi.howdoi(vars(howdoi.get_parser().parse_args(event.args.split(' '))))
     response = re.sub(r'\n\n+', '\n\n', response).strip()