diff --git a/src/http/modules/ngx_http_addition_filter_module.c b/src/http/modules/ngx_http_addition_filter_module.c
index db4970bf1..2fad0e59b 100644
--- a/src/http/modules/ngx_http_addition_filter_module.c
+++ b/src/http/modules/ngx_http_addition_filter_module.c
@@ -171,6 +171,7 @@ ngx_http_addition_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
     for (cl = in; cl; cl = cl->next) {
         if (cl->buf->last_buf) {
             cl->buf->last_buf = 0;
+            cl->buf->last_in_chain = 1;
             cl->buf->sync = 1;
             last = 1;
         }