diff --git a/rest/system-discovery-post.rst b/rest/system-discovery-post.rst
index 937618e8a..953d7695b 100644
--- a/rest/system-discovery-post.rst
+++ b/rest/system-discovery-post.rst
@@ -1,6 +1,8 @@
 POST /rest/system/discovery
 ================================
 
+.. note:: Removed in v0.12.0.
+
 Post with the query parameters ``device`` and ``addr`` to add entries to
 the discovery cache.