# This patch is revert commit dd5bb073107caa1c764158b87fb8482124aad6c1
--- contrib/python/aiohttp/aiohttp/web_response.py	(index)
+++ contrib/python/aiohttp/aiohttp/web_response.py	(working tree)
@@ -147,8 +147,6 @@ class StreamResponse(BaseClass, HeadersMixin):
         self._status = int(status)
         if reason is None:
             reason = REASON_PHRASES.get(self._status, "")
-        elif "\n" in reason:
-            raise ValueError("Reason cannot contain \\n")
         self._reason = reason
 
     @property