diff --git a/doc/api/zlib.md b/doc/api/zlib.md
index ed94896e97..5575d03d33 100644
--- a/doc/api/zlib.md
+++ b/doc/api/zlib.md
@@ -711,5 +711,6 @@ Decompress a chunk of data with [Unzip][].
 [Inflate]: #zlib_class_zlib_inflate
 [Memory Usage Tuning]: #zlib_memory_usage_tuning
 [Unzip]: #zlib_class_zlib_unzip
+[`UV_THREADPOOL_SIZE`]: cli.html#cli_uv_threadpool_size_size
 [options]: #zlib_class_options
 [zlib documentation]: http://zlib.net/manual.html#Constants