nable to patch nginx source (can't find file to patch)

[root@linux nginx]# patch -p1 </usr/local/nginx/0004-Accept-variable-name-as-upload_limit_rate-argument.patch
can't find file to patch at input line 14
Perhaps you used the wrong -p or --strip option?
The text leading up to this was:
--------------------------
|From 8f4cad171fe4fed9cbd11a6a10fb4880e49bf9f6 Mon Sep 17 00:00:00 2001
|From: example <example@example.com>
|Date: Fri, 12 Feb 2016 11:28:56 +0600
|Subject: [PATCH] Accept variable name as upload_limit_rate argument
|
|---
| ngx_http_upload_module.c | 27 +++++++++++++++++----------
| 1 file changed, 17 insertions(+), 10 deletions(-)
|
|diff --git a/ngx_http_upload_module.c b/ngx_http_upload_module.c
|index 93ded70..6bd5027 100644
|--- a/ngx_http_upload_module.c
|+++ b/ngx_http_upload_module.c
--------------------------
File to patch:

What I am Doing Wrong Any?