diff -Nur aiohttp-3.7.1/aiohttp/_cparser.pxd aiohttp-3.7.1-new/aiohttp/_cparser.pxd
--- aiohttp-3.7.1/aiohttp/_cparser.pxd	2020-10-25 08:26:45.000000000 +0100
+++ aiohttp-3.7.1-new/aiohttp/_cparser.pxd	2020-10-26 09:07:05.024487885 +0100
@@ -1,7 +1,7 @@
 from libc.stdint cimport uint16_t, uint32_t, uint64_t
 
 
-cdef extern from "../vendor/http-parser/http_parser.h":
+cdef extern from "http_parser.h":
     ctypedef int (*http_data_cb) (http_parser*,
                                   const char *at,
                                   size_t length) except -1
diff -Nur aiohttp-3.7.1/setup.py aiohttp-3.7.1-new/setup.py
--- aiohttp-3.7.1/setup.py	2020-10-25 08:26:45.000000000 +0100
+++ aiohttp-3.7.1-new/setup.py	2020-10-26 09:07:05.024487885 +0100
@@ -27,7 +27,6 @@
         "aiohttp._http_parser",
         [
             "aiohttp/_http_parser.c",
-            "vendor/http-parser/http_parser.c",
             "aiohttp/_find_header.c",
         ],
         define_macros=[("HTTP_PARSER_STRICT", 0)],
