diff --git a/src/anthropic/lib/streaming/_messages.py b/src/anthropic/lib/streaming/_messages.py
index 7e06c127..d39993a8 100644
--- a/src/anthropic/lib/streaming/_messages.py
+++ b/src/anthropic/lib/streaming/_messages.py
@@ -15,7 +15,7 @@
 )
 from ...types import Message, ContentBlock, RawMessageStreamEvent
 from ..._utils import consume_sync_iterator, consume_async_iterator
-from ..._models import construct_type, build
+from ..._models import build, construct_type
 from ..._streaming import Stream, AsyncStream
 
 if TYPE_CHECKING: