--- a/src/http/ngx_http_header_filter.c
+++ b/src/http/ngx_http_header_filter.c
@@ -33,6 +33,9 @@ ngx_module_t  ngx_http_header_filter_mod
 };
 
 
+static ngx_http_output_body_filter_pt    write_filter;
+
+
 static char server_string[] = "Server: " NGINX_VER CRLF;
 
 
@@ -355,7 +358,7 @@ static ngx_int_t ngx_http_header_filter(
     ln->buf = b;
     ln->next = NULL;
 
-    return ngx_http_write_filter(r, ln);
+    return write_filter(r, ln);
 }
 
 
@@ -363,5 +366,7 @@ static ngx_int_t ngx_http_header_filter_
 {
     ngx_http_top_header_filter = ngx_http_header_filter;
 
+    write_filter = ngx_http_top_body_filter;
+
     return NGX_OK;
 }