diff --git a/aioredis/client.py b/aioredis/client.py
index 2e53d8e54..3d0ba7aee 100644
--- a/aioredis/client.py
+++ b/aioredis/client.py
@@ -4146,6 +4146,7 @@ def unsubscribe(self, *args) -> Awaitable:
             parsed_args = list_or_args(args[0], args[1:])
             channels = self._normalize_keys(dict.fromkeys(parsed_args))
         else:
+            parsed_args = []
             channels = self.channels
         self.pending_unsubscribe_channels.update(channels)
         return self.execute_command("UNSUBSCRIBE", *parsed_args)