diff --git a/kafka/protocol/admin.py b/kafka/protocol/admin.py
index 40963acb1..de6b996fd 100644
--- a/kafka/protocol/admin.py
+++ b/kafka/protocol/admin.py
@@ -355,7 +355,7 @@ class CreatePartitionsRequest_v0(Request):
             ('topic', String('utf-8')),
             ('new_partitions', Schema(
                 ('count', Int32),
-                ('assignment', Array(Int32)))))),
+                ('assignment', Array(Array(Int32))))))),
         ('timeout', Int32),
         ('validate_only', Boolean)
     )