diff --git a/pydantic_ai_slim/pydantic_ai/models/openai.py b/pydantic_ai_slim/pydantic_ai/models/openai.py
index 7ff5b2f7f9..e5ca4325e5 100644
--- a/pydantic_ai_slim/pydantic_ai/models/openai.py
+++ b/pydantic_ai_slim/pydantic_ai/models/openai.py
@@ -1172,8 +1172,7 @@ async def _get_event_iterator(self) -> AsyncIterator[ModelResponseStreamEvent]:
                 continue
 
             # Handle the text part of the response
-            content = choice.delta.content
-            if content is not None:
+            if (delta := choice.delta) is not None and (content := delta.content) is not None:
                 maybe_event = self._parts_manager.handle_text_delta(
                     vendor_part_id='content',
                     content=content,