diff --git a/src/http/ngx_http_header_filter_module.c b/src/http/ngx_http_header_filter_module.c
index 1e01c857d..e3efbba5b 100644
--- a/src/http/ngx_http_header_filter_module.c
+++ b/src/http/ngx_http_header_filter_module.c
@@ -112,7 +112,7 @@ static ngx_str_t ngx_http_status_lines[] = {
#define NGX_HTTP_OFF_5XX (NGX_HTTP_LAST_4XX - 400 + NGX_HTTP_OFF_4XX)
ngx_string("500 Internal Server Error"),
- ngx_string("501 Method Not Implemented"),
+ ngx_string("501 Not Implemented"),
ngx_string("502 Bad Gateway"),
ngx_string("503 Service Temporarily Unavailable"),
ngx_string("504 Gateway Time-out"),
diff --git a/src/http/ngx_http_special_response.c b/src/http/ngx_http_special_response.c
index 224cb811d..318b52be2 100644
--- a/src/http/ngx_http_special_response.c
+++ b/src/http/ngx_http_special_response.c
@@ -260,9 +260,9 @@ static char ngx_http_error_500_page[] =
static char ngx_http_error_501_page[] =
"" CRLF
-"501 Method Not Implemented" CRLF
+"501 Not Implemented" CRLF
"" CRLF
-"501 Method Not Implemented
" CRLF
+"501 Not Implemented
" CRLF
;
@@ -384,6 +384,7 @@ ngx_http_special_response_handler(ngx_http_request_t *r, ngx_int_t error)
case NGX_HTTPS_CERT_ERROR:
case NGX_HTTPS_NO_CERT:
case NGX_HTTP_INTERNAL_SERVER_ERROR:
+ case NGX_HTTP_NOT_IMPLEMENTED:
r->keepalive = 0;
}
}