diff --git a/disco/api/http.py b/disco/api/http.py
index 31035e4..951a143 100644
--- a/disco/api/http.py
+++ b/disco/api/http.py
@@ -203,7 +203,7 @@ class HTTPClient(LoggingClass):
 
         # Build the bucket URL
         args = {to_bytes(k): to_bytes(v) for k, v in six.iteritems(args)}
-        filtered = {k: (v if v in ('guild', 'channel') else '') for k, v in six.iteritems(args)}
+        filtered = {k: (v if k in ('guild', 'channel') else '') for k, v in six.iteritems(args)}
         bucket = (route[0].value, route[1].format(**filtered))
 
         # Possibly wait if we're rate limited