diff --git a/doc/api/perf_hooks.md b/doc/api/perf_hooks.md
index 7972e1edb24f43..f41caf6f53112f 100755
--- a/doc/api/perf_hooks.md
+++ b/doc/api/perf_hooks.md
@@ -3,6 +3,8 @@
 added: REPLACEME
 -->
 
+> Stability: 1 - Experimental
+
 The Performance Timing API provides an implementation of the
 [W3C Performance Timeline][] specification. The purpose of the API
 is to support collection of high resolution performance metrics.