diff --git a/discord/ext/commands/core.py b/discord/ext/commands/core.py
index 4e5721a22..387030161 100644
--- a/discord/ext/commands/core.py
+++ b/discord/ext/commands/core.py
@@ -347,7 +347,7 @@ class Command(_BaseCommand):
             pass
         else:
             if module is not None and (module.startswith('discord.') and not module.endswith('converter')):
-                converter = getattr(converters, converter.__name__ + 'Converter')
+                converter = getattr(converters, converter.__name__ + 'Converter', converter)
 
         try:
             if inspect.isclass(converter):