diff --git a/pydantic_ai_slim/pydantic_ai/mcp.py b/pydantic_ai_slim/pydantic_ai/mcp.py
index d062fd938f..2aae85a6c8 100644
--- a/pydantic_ai_slim/pydantic_ai/mcp.py
+++ b/pydantic_ai_slim/pydantic_ai/mcp.py
@@ -373,7 +373,7 @@ async def client_streams(
             url=self.url,
             headers=self.headers,
             timeout=timedelta(seconds=self.timeout),
-            sse_read_timeout=timedelta(self.sse_read_timeout),
+            sse_read_timeout=timedelta(seconds=self.sse_read_timeout),
         ) as (read_stream, write_stream, _):
             yield read_stream, write_stream