diff --git a/doc/adapter-api.txt b/doc/adapter-api.txt
index 464434a..490608e 100644
--- a/doc/adapter-api.txt
+++ b/doc/adapter-api.txt
@@ -335,3 +335,8 @@ Properties	string Address [readonly]
 				"peripheral": Supports the peripheral role.
 				"central-peripheral": Supports both roles
 						      concurrently.
+
+		array{string} ExperimentalFeatures [readonly, optional]
+
+			List of 128-bit UUIDs that represents the experimental
+			features currently enabled.