diff --git a/extensions/url_cleaner.py b/extensions/url_cleaner.py
index 4c67041..9e64204 100644
--- a/extensions/url_cleaner.py
+++ b/extensions/url_cleaner.py
@@ -111,6 +111,9 @@ async def on_message(self, message: discord.Message):
 		if message.content.startswith(config.BOT_PREFIX):
 			return
 
+		if not message.guild:
+			return
+
 		# check if server has URL cleaner enabled
 		url_cleaner_settings = await self.bot.db.pool.fetchrow(
 			"SELECT * FROM url_cleaner_settings WHERE discord_server_id = $1", message.guild.id