diff --git a/modules/uac/doc/uac_admin.xml b/modules/uac/doc/uac_admin.xml
index 3e6021fe1b7..dc95ec8fadc 100644
--- a/modules/uac/doc/uac_admin.xml
+++ b/modules/uac/doc/uac_admin.xml
@@ -899,6 +899,27 @@ event_route[uac:reply] {
The value is what should be matcheg against the value of the attribute
in the remote registration record.
+
+ The state of the registration is reflected in the flags field:
+
+
+ 1 (2^0) - registration profile is disabled
+
+
+ 2 (2^1) - registration in progress
+
+
+ 4 (2^2) - registration succeeded
+
+
+ 8 (2^3) - registration in progres with authentication
+
+
+ 16 (2^4) - registration initialized (after loading from database,
+ the registration process was initialized)
+
+
+
uac.reg_info usage