Improve LMS private function warning
Signed-off-by: Raef Coles <raef.coles@arm.com>
diff --git a/include/mbedtls/lms.h b/include/mbedtls/lms.h
index 15a1a1b..850bb6a 100644
--- a/include/mbedtls/lms.h
+++ b/include/mbedtls/lms.h
@@ -347,7 +347,8 @@
*
* \warning This function is **not intended for use in
* production**, due to as-yet unsolved problems with
- * handling stateful keys.
+ * handling stateful keys. The API for this function
+ * may change considerably in future versions.
*
* \note The seed must have at least 256 bits of entropy.
*
@@ -398,7 +399,8 @@
*
* \warning This function is **not intended for use in
* production**, due to as-yet unsolved problems with
- * handling stateful keys.
+ * handling stateful keys. The API for this function
+ * may change considerably in future versions.
*
* \note Before this function is called, the context must
* have been initialized and must contain a private