diff --git a/psqlextra/backend/schema.py b/psqlextra/backend/schema.py
index 28e9211a..31a23414 100644
--- a/psqlextra/backend/schema.py
+++ b/psqlextra/backend/schema.py
@@ -1045,7 +1045,7 @@ def _partitioning_properties_for_model(model: Type[Model]):
                 % (model.__name__, meta.method)
             )
 
-        if not isinstance(meta.key, list):
+        if not isinstance(meta.key, (list, tuple)):
             raise ImproperlyConfigured(
                 (
                     "Model '%s' is not properly configured to be partitioned."