diff --git a/pydantic_ai_slim/pydantic_ai/providers/google.py b/pydantic_ai_slim/pydantic_ai/providers/google.py
index d0de4bcc4f..a4ba0c5a3b 100644
--- a/pydantic_ai_slim/pydantic_ai/providers/google.py
+++ b/pydantic_ai_slim/pydantic_ai/providers/google.py
@@ -219,5 +219,6 @@ class _NonClosingApiClient(BaseApiClient):
     async def aclose(self) -> None:
         # The original implementation also calls `await self._async_httpx_client.aclose()`, but we don't want to close our `cached_async_http_client` or the one the user passed in.
         # TODO: Remove once https://github.com/googleapis/python-genai/issues/1566 is solved.
-        if self._aiohttp_session:
-            await self._aiohttp_session.close()  # pragma: no cover
+        session = getattr(self, '_aiohttp_session', None)
+        if session is not None:
+            await session.close()  # pragma: no cover