diff --git a/valgrind.suppress b/valgrind.suppress
index 88b872faa..74efefa28 100644
--- a/valgrind.suppress
+++ b/valgrind.suppress
@@ -21,6 +21,15 @@
    ...
    fun:ngx_crc32_table_init
 }
+{
+   <headers-more-nginx-module: set_header_helper>
+   Memcheck:Cond
+   fun:ngx_http_set_header_helper
+   fun:ngx_http_headers_more_exec_cmd
+   fun:ngx_http_headers_more_filter
+   ...
+   fun:main
+}
 {
    <wasmer 3.1.1: parse>
    Memcheck:Cond