diff --git a/src/http/modules/ngx_http_headers_filter_module.c b/src/http/modules/ngx_http_headers_filter_module.c
index c846c5f..7544733 100644
--- a/src/http/modules/ngx_http_headers_filter_module.c
+++ b/src/http/modules/ngx_http_headers_filter_module.c
@@ -145,6 +145,7 @@
         || r != r->main
         || (r->headers_out.status != NGX_HTTP_OK
             && r->headers_out.status != NGX_HTTP_NO_CONTENT
+            && r->headers_out.status != NGX_HTTP_PARTIAL_CONTENT
             && r->headers_out.status != NGX_HTTP_MOVED_PERMANENTLY
             && r->headers_out.status != NGX_HTTP_MOVED_TEMPORARILY
             && r->headers_out.status != NGX_HTTP_NOT_MODIFIED))