diff --git a/bot.py b/bot.py
index aa65f6e..c04199c 100755
--- a/bot.py
+++ b/bot.py
@@ -72,10 +72,11 @@ class BotClient(discord.Client):
         return message.content.startswith("%")
 
     async def on_command(self, message: discord.Message):
-        command = message.content.split(" ")[0]
+        parts = message.split(" ")
+        command = message.split(" ")[0]
         match command:
             case "%calc":
-                reply = await self._calculate(command[1:])
+                reply = await self._calculate(parts[1:])
                 await message.reply(content=reply)
             case _:
                 _log.info(f"Unrecognised command {command}")