--- a/src/http/ngx_http_request.h
+++ b/src/http/ngx_http_request.h
@@ -68,6 +68,8 @@ typedef struct {
 
 
 typedef struct {
+    ngx_table_t      *headers;   /* it must be first field */
+
     ngx_table_elt_t  *host;
     ngx_table_elt_t  *connection;
     ngx_table_elt_t  *if_modified_since;
@@ -83,8 +85,6 @@ typedef struct {
     ssize_t           content_length_n;
     size_t            connection_type;
     ssize_t           keep_alive_n;
-
-    ngx_table_t      *headers;
 } ngx_http_headers_in_t;
 
 
@@ -108,6 +108,8 @@ typedef struct {
 
 
 typedef struct {
+    ngx_table_t      *headers;   /* it must be first field */
+
     int               status;
     ngx_str_t         status_line;
 
@@ -124,8 +126,6 @@ typedef struct {
     ngx_str_t         charset;
     ngx_array_t       ranges;
 
-    ngx_table_t      *headers;
-
     off_t             content_length_n;
     char             *etag;
     time_t            date_time;
@@ -231,4 +231,9 @@ struct ngx_http_request_s {
 };
 
 
+extern ngx_http_header_t ngx_http_headers_in[];
+extern ngx_http_header_t ngx_http_headers_out[];
+
+
+
 #endif /* _NGX_HTTP_REQUEST_H_INCLUDED_ */