diff --git a/api-ref/source/os-certificates.inc b/api-ref/source/os-certificates.inc
index c45dcd5caeb1..28fc3749ef88 100644
--- a/api-ref/source/os-certificates.inc
+++ b/api-ref/source/os-certificates.inc
@@ -1,8 +1,8 @@
 .. -*- rst -*-
 
-=====================================
- Root certificates (os-certificates)
-=====================================
+=================================================
+ Root certificates (os-certificates) (DEPRECATED)
+=================================================
 
 Creates and shows details for a root certificate.